When you enter a public bathroom, drop trow, and projectile shit all over the wall. Wiping is not allowed - you must immediately button your pants and exit the restroom.
Ideally done in a bar. Can be a dive bar or a fancy establishment, with preference on the later.
While exiting the restroom, you yell out "Hey, there is a Banksy painted on the wall in there!" It is strongly recommended you vacate the premises immediately after.
Hey, Jay, you should Drop a Banksy in that bathroom.