QWOP is a notoriously difficult browser running game released in 2008, in which players control an athlete's thighs and calves with the Q, W, O and P keys. Because the controls are intentionally awkward, almost every run ends in a flailing collapse, and clips of those failures spread widely as comedy online. The game became a shorthand for frustrating physics and hopeless persistence, which is why short reaction sounds tied to its name still work in edits today, even for viewers who have never played it themselves.