So, a snake slithers into a bar and the bartender says, "I'm sorry but I can't serve you."
"Why not?" asks the snake.
The bartender says,"Because you can't hold your liquor."

Website 4 the Day:
Snakes on a plane (surface):
http://www.kongregate.com/games/Uchiha/classic-snake-game
http://www.onemotion.com/flash/snake-game/