The cry comes from Nintendo's Super Mario platformers, where Mario yelps as he falls from a ledge or misses a jump, a staple since the series moved to voiced 3D entries. Clipped and shared by players, it spread through fail compilations, Let's Plays and short-form memes as instant shorthand for a doomed fall. Like the Roblox oof, it is now shorthand for an instant fail in edits. Its staying power comes from instant recognition: two seconds of that voice tells viewers exactly what kind of mistake just happened.