Continuity mistake: When one of the kids break into the laboratory, everyone else is partying in the garden. In the outside shots, it is dark, but in all the shots from inside the lab you can see through the windows that it is daylight outside.
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.
Trivia: This is one of the three movies directed by Bert I. Gordon to be featured on "Mystery Science Theater 3000." The other two being "Earth vs. The Spider" aka. "The Spider", and "Beginning of the End."