I was watching the lovely and highly forgettable Two Weeks Notice with Hugh Grant and Sandra Bullock. There is a scene where she is the passenger in the car and they are stuck in traffic and all the food she over ate at a tennis place is now hitting her hard. Hilarity ensues.
It strikes me as funny as I cannot think of another movie where an actual bodily function like that is portrayed in a somewhat realistic ( or even unrealistic) manner.
I know Dopers and their love of Scatology will not let me down.