Continuity mistake: While Thor is taking "sips" at Soren's party, the girl [who may appear to be a boy at first glance] behind him (on the far left of the screen) changes position a few times. Sometimes she is standing directly next to the girl to her right (almost touching shoulders), other times she is further away, and another time she is standing behind the girl.
Continuity mistake: When Thor is crossing the highway before the mall and drops the beer bottle, there are three vehicles approaching and relatively close to him: from left to right, a blue car, a white (or gray?) car, and a red pickup truck. When Thor goes back for the beer bottle, there are different cars approaching, and they are more distant than the previous ones. There is a white truck in the far left lane and a white car in the far right lane and two vehicles further back in between. Looking behind Thor, the cars that have just passed him are not the cars that were first shown. Next, the initial three vehicles (blue car on the left, etc.) are approaching again, are close to Thor, and then crash.
Continuity mistake: When the cell phone Max is using to steer the drone hits the ground, the grass is mostly brown and dry. When Thor throws and smashes the potted flower/vase on the ground in the same area, the grass is suddenly green. (00:20:47)
Other mistake: In a deleted scene, Hannah wants to spend time with Lily because Lily is leaving, although her destination is not revealed. Lily's brother Soren and her mother apparently aren't going anywhere, so it didn't make sense that Lily would be leaving two weeks into the public school year. Additionally, Hannah and Lily have been best friends and in the same class since eighth grade. Therefore, instead of saying, "Tomorrow I'm skipping school", "Hannah should have said, "Tomorrow WE are skipping school..." It seems like the writers decided to abandon the idea that Lily was going somewhere but the rest of her family wasn't and she was somehow not under the same school schedule as Hannah. However, they forgot to add Lily to the skipping school idea that Hannah was going to do so that they could spend more time together. (It wouldn't make sense for Hannah - but not Lily - to skip school). (00:17:56)
Continuity mistake: At Thor's party, Max's hair (bangs) changes a few times. His bangs can be combed to the right or some strands are horizontal across his forehead. Sometimes he has a gap in his bangs on the right side and another time there is a gap between his bangs and sideburns. (01:20:13)
Other mistake: Mr. Newman (Max's dad) automatically assuming that Max was to blame for using the drone and wrecking the room can be viewed as a mistake when certain factors are taken into consideration. In the opening scene, Max and his dad are presented as having a good father-son relationship; Mr. Newman even refers to Max as his "buddy" and says he is proud of him. Max tells his dad he won't touch the drone. When Max's dad calls to tell him he will be home early, Max sounds cheerful and does not let on that anything is wrong. Hence, it would make more sense for Mr. Newman to believe that Max's little sister was responsible for the mess - she would be less likely to know how to use and steer the drone, causing a lot of damage in the room before she could get the drone under control or the drone crashed. Why Max never bothered to worry that his mother (or his little sister, for that matter) would notice that the drone was missing is another flaw.
Other mistake: Max was supposed to be more developmentally mature than Thor and Lucas and going through puberty but there were no indications of this. He still had a child's voice, did not have any facial hair (or "pubes"), and did not appear to have started a growth spurt. Even though he had hormones raging through his body, he did not have one pimple (zit). [Make-up artists have put zits on many adults to make them look younger in teen movies.] The co-writers deliberately used 12-year-olds to make them look the part and convince the audience that they were naive, but Max, especially, did not look the part.
Other mistake: At the party, Max did not have anywhere from which to pull out the "necklace" (anal beads) to give to Brixlee. It apparently was not in his pants' pockets or his little leather jacket, and he did not have a backpack with him. The beads were simply too big to have hidden them under his clothes.
Other mistake: Near the end when the Good Boys are fighting/arguing, Max tells Thor that he skipped the "Rock of Ages" audition because he didn't think it was cool. Thor missed the audition because Max got him and Lucas to skip school in order to go to the mall and buy a replacement drone.
Other mistake: Hannah's bag (purse) never reappeared and after the first day when she said it contained her license and phone, she never asked for them again! What 17-18 year-old would not be concerned about her driver's license or cell phone? The next morning at the playground across from the school, Lily even said, "Give us the bag or I will hurt you." Hannah was driving without a license.
Other mistake: If the Good Boys gave the cop the Molly in the vitamin bottle, where did they get the vitamin bottle they gave to the girls in the mall parking lot?
Suggested correction: They got it from Benji when the girls dropped them off at the frat house.
Other mistake: The amount of time that lapsed between the Good Boys leaving/skipping school (around 8:00 AM?) and Max's dad calling to say he'd be home early (some time before 5:00 PM) was excessive. Even if it took the Good Boys two hours to get to the mall, they got a ride halfway home and had 1.7 miles to get home. If it was now around noon (?) or within school hours, why would Max's dad call him to say he was going to be home early? If it was closer to 3:00 or 4:00 PM, where were the boys after leaving the mall, especially since they wanted to get back ASAP to replace the drone at home?
Other mistake: When the Good Boys are riding from the mall with the girls, Lucas says, "Everyone knows you meet your best friends in kindergarten", implying that's where the Good Boys met. However, in an earlier scene, Lucas told Claude that he met Max and Thor "the summer he moved there" and they started a dog-washing business and made $8.00 which they used to buy the Ascension cards. (They wouldn't be in kindergarten in the summer or be old enough to start a business).
Other mistake: The double-sided dildo used to hold the store's door closed and keep the cop inside was not among the "weapons" that Thor found in his parents' closet. Where did it come from?
Other mistake: Max tells the neighbor girl they were using the drone to follow a family of turtles [should be tortoises] and think the drone crashed in the back yard. The yard is fenced, which means turtles/tortoises could not be in the neighbor's yard.
Suggested correction: Don't forget they were lying.
Okay, I'll try to remember... but are you insinuating that if they weren't lying, the turtles/tortoises could have gone through the fence and into the neighbor's yard?
Continuity mistake: At the sleepover (supposedly, Wednesday night), the Good Boys are supposed to go to the skate park the next day after school, but they are there before they are in school on Thursday.
Continuity mistake: When they are trying to pop Lucas' arm back into its socket he has a ball gag in his mouth. Watch, as the depth of him sucking on the ball gag changes. Sometimes it's near the front of his mouth, sometimes he has it almost completely swallowed.
Suggested correction: I rewatched the scene three times and I don't think it is a continuity mistake. It is true that sometimes the ball is mostly outside of the lips and other times it is mostly in the mouth. But there is a pattern - out, in, out, in, out. I get the impression that the depth of the ball in Lucas' mouth correlates with his breathing (inhaling or exhaling) and/or varies with his arm being pulled by Max and Thor. The ball goes lower in his mouth when Max and Thor start yanking.