A brilliant film that helped define a genre

I like movies that are aware of what they are selling... without [any] greater aspirations than to make people laugh and that's it.

A film with more than the usual spoiler issues. Talking about it in any detail feels akin to handing you a gift-wrapped present and saying, "I hope you like it -- It's a thriller about a diabolical secret experiment."

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.