Revealing: In Buddy Kupfer's death scene as "little" Buddy falls to the floor and the creatures exit his mask, his hand moves across the floor in one shot after several creatures have already exited the mask (even the rattlesnake wouldn't have the power to do that) and he is obviously dead.

Continuity: When Dan is peering through the ventilation grate at the control room, we see Cochran hanging up the phone. In the next shot (close-up) Cochran still hasn't put the phone down.