Best horror movie stupidity of all time

Stupidity: While Jeff was home and Maggie was at work, Jennifer fell and hit her head, requiring a trip to the emergency room. It was an accident, but Grandpa Paul, an attorney, asserted it was "reckless endangerment." (00:10:10)

KeyZOid

Stupidity: How would a devout catholic like Angela not believe in the devil, as she tells Constantine? Makes no sense.

Stupidity: The people running away from the ferris wheel when it was rolling towards them should've been able to run towards it.

AAL117

Stupidity: When Jody traps Michael in his room, he does so by sticking a screwdriver between the the door and the jamb. This likely wouldn't accomplish much regardless, but it especially wouldn't work in this situation because the door opens into the room, so Michael could simply open the door and the screwdriver would fall on the ground.

Aaron Craig

Stupidity: Soon after the new art therapy instructor Anna arrived for her first day at the mental hospital, Leena - the most dangerous patient - was not in her room and nobody could find her. The hospital went into lock down and the doctor took Anna to a room. Without first looking in the room, the doctor said, "Do not leave this room. Don't worry, you will be safe here and we'll come back after we found her" and then locked Anna inside the room - with Leena. (00:03:36 - 00:04:41)

KeyZOid

Stupidity: Sam slid under the truck to narrowly escape the lioness. Even though there was more than enough ground clearance, the lioness did not go under the truck to attack Sam, as though the truck's frame were a barrier. The lioness could have easily crawled under the truck (unless a CGI lioness is not as spry or nimble as a "real" lioness). Sam being under the truck would not constitute adequate protection from an attacking lioness. (01:10:30 - 01:35:20)

KeyZOid

Stupidity: The bad guys attack the chief of police that is driving a patrol car; their plan works because the man doesn't use the radio to call HQ, and there's no reason why he wouldn't do that.

Sammo ★

Stupidity: During the movie, the bad guys keep the main character alive and free to roam the facility at will (even if they made him sign an incriminating form at the very beginning stating he's an inmate) doing absolutely nothing to restrict his freedom till the very end - he even retains personal effects like his broken Rolex and lighter, his wallet full of cash! He breaks into every forbidden area, picks up fights, damages property, escapes multiple times and 'corrupts' the person the whole facility is built for. He is worth absolutely nothing to them and has nobody waiting for him or that will look for him.

Sammo ★

Stupidity: It seems idiotic that only mesh gates hold the inmates of the asylum back when indoors, surely they'd use steel or have them shut in with concrete and electronic key pads.

Rob245

Stupidity: There's no reason the robber can't use baby Ricky, who's still in the car, as a hostage to force Billy out of hiding.

Rob245