Revealing mistake: When the teens are at the theater for the first time, one of the teens on the right leans on a statue that bends after he leans. He then looks over quickly and stops leaning. He then looks sheepishly at the camera.
Revealing mistake: When the girl on the motorcycle is trying to tie Mike's legs together by driving around them in circles, his legs are obviously props. This also goes for later, when he is lying on the ground and the townspeople are trying to tie him up. When his legs are in shot, they look fake, and never moves an inch.Twotall
Plot hole: The giant-sized teenagers show themselves at the garden party and start making threats about taking over the town. They then spend the night in the theatre, and the next day they decide to cut off all communications to and from the town. For some reason, not one of the party-goers, or the sheriff, decided to call someone during the night and tell the remarkable story about 30 feet tall teenagers seizing the power through force.Twotall
Other mistake: When the teens first grew into giants, their clothes did not grow with them, so they had to make improvised clothing out of theater curtains. In the end, when exposed to the shrinking gas, the teens become their regular size, and the improvised clothes also shrink with them. No one else's clothes are affected by the gas in this way.Twotall