Revealing mistake: When everyone is supposed to be frozen, the neighbor girl standing behind the car can be seen moving her hand onto the car. This happens as Monica says "I'm not afraid of you, Wanda." (00:24:25)
Revealing mistake: When Edward opens the gate to let Tracy in, we then see a shot of Tracy and you can see it is repeated footage of her from when she met Edward for the first time.
Where Is Chick Lorimer, Where Has She Gone? - S3-E13
Revealing mistake: Tod parks his car across the street, facing left. While standing in front of the house Ellen and Peter run to Peter's vehicle and drive off to the right. Tod goes back across the street and gets back in the Corvette. The image is then flipped to give the illusion that he is driving in the direction Ellen and Peter went. (00:21:00)
Revealing mistake: During his first confrontation with the alien, Hayata's pistol shoots powerful rays that don't cause a single speck of damage to the walls when the monster dodges them. They are just superimposed. (00:09:40)
Lightspeed - S5-E8
Revealing mistake: When the HIVE Five exit the museum and are intercepted by Kid Flash, Mammoth loses both his pants and the artifacts he has before KF whizzes past him. It's best seen in slow motion; at normal speed this mistake is hard to catch.
Revealing mistake: When the assistant gets thrown into the wall by the brain controlled Gar-tiger, there are already marks on the point of impact, from previous takes.
Mind Your Mummy Mommy, Mario - S1-E3
Revealing mistake: When King Koopa says Princess Toadstool is trapped, the Paragoombas freeze. In the same shot, the orange spikes on King Koopa's shackles turn white. (00:09:14)
Revealing mistake: When the channel 6 crew member is telling April they should go, his hand disappears for a frame.
Revealing mistake: During the fight against Juan Greco and his partner, Diego is replaced by a stunt double. (00:12:58)
Not Kansas - S3-E21
Revealing mistake: As the guy fires the machine gun at Guardian, there's a closeup of bullet casings falling to the ground, but they're not just empty casings, they're fired blank rounds.
Revealing mistake: Whenever Isis has to do jumps you can tell it's not her but a stunt double.
Revealing mistake: When Major Popov aims the rocket launcher at the Venus probe, there is no rocket in the launcher- it is just an empty tube.
Revealing mistake: Jamie prepares to split a giant heavy log in two, with her bionic arm, so that it will fit into her fireplace. Just as her arm comes down, you can see the middle seam where the log was pre-cut for the shot, so that it easily breaks in two. (00:00:30)
Revealing mistake: Near the end of the battle at the end of the episode, we see some Japanese troops coming out from the jungle. The Marines then shoot a machine gun, killing them. But pay attention to the ammo belt. All the bullets are blanks. (00:38:50)
Revealing mistake: The scene in the captain's quarters has water dripping from the ceiling. With the ship rocking from side to side, the water drops down perpendicular to the table the whole time, showing the scene is stationary and the camera is tilting. (00:14:00 - 00:14:35)