After performing the Ritual in the Snake Temple, the snake's mouth opens to reveal a room with a lever. After pulling this lever, the floor opens and closes a few times, crushing my character in the sixth slot. When I jump down, I get "stuck" and I can't look around or move at all. The view just rotates randomly. I have re-loaded 10 times, and still the party gets caught and will not slide down to the bottom!
Has anyone else experienced this?

If you time the jump you should be able to fall between the two halves of the platform. Then the fun starts....