Over Under is a bathroom stall challenge where you must enter a public restroom and piss a clean stream over the divider to the neighboring stall, then lay down on the
floor and bend your piss stream, under the divider, into the same neighboring stall. Over Under has recently been taken up by the speedrunning community. 100% runs of Over Under start when the stall door is locked and are disqualified if as
little as a drop of piss hits the divider
wall (This is known as Walling Out). If one
Walls Out they still must complete the run by laying down in a puddle of their own piss and completing the Under portion of the
run. If a speedrunner successfully avoids Walling Out their time
ends when the stall door opens. Video evidence must be submitted to the forums with any Over Under speedrun