5. Drink Driving (Dumb & Dumber)
Here we are again with the king of movie toilet humour; Dumb and Dumber (last one, I promise). In this scene, Lloyd and Harry are driving along with several beer bottles full of urine, after Lloyd was forced to pee while the vehicle was moving. They're pulled over for speeding by a highway cop on a motorcycle who sees the open bottles and makes the assumption that they're driving under the influence and have open bottles of booze in a movie vehicle. When the duo deny those allegations, the cop bizarrely decides to take a taste test for himself. Upon realising that it wasn't beer that he just drank, the cop tells them to "get the hell out of here" before throwing up.