Revealing mistake: When the house has been locked down at the beginning of the film no moonlight could come in, however when the guests are being shown the coffin with the guns in there is a shaft of bright moonlight shining on to it.
Revealing mistake: In the opening scene of the film we see the patients of the institute smash through a cubicle where a guy is, watch closely. The glass breaks away very very easily, obviously some kind of special easy-to-break glass used for this scene. (00:04:30)
Answer: Its just an illusion by Price. His rides are meant to confuse you. Like the tower ride looked like the cable broke and was falling to the ground.