Imagine you're in a cube shaped room (14x14x14 ft.). There's a door on each side of the room that leads to another, nearly identical to the one you're in now. The only distinguishing features are the colour of the room and seemingly random numbers printed on the doorways..........oh..........and the booby traps. The traps will dice you, incinerate you, hollow out your skull with hydrochloric acid, and lots of other neat stuff (or there may not be a trap at all).

Now imagine you wake up in one of these rooms, with no recollection of how you got there and no idea of why you're there or how to get out.

This is a great low budget ($300,000 Canadian) sci-fi flick. I'm not suprised at all that it did very well internationally (and quite surprised that the Americans didn't seem to take to it).