"Don't ping my cheese with your bandwidth" - Dilbert

With the success of Snakes on a Plane they'll just have to make a sequel. The guys and work and I came up with a list of possible scenarios.

Snakes on the space shuttle
Snakes on a gondolla
Snakes on a submarine
Snakes on a train
Snakes in space
Snakes in time
Snakes on a jetski

What else would make a good "Snakes on a" movie?