Nico's Nextbots is a Roblox horror game built around fast moving nextbot characters that chase players through maps, and Hopper is one of the names players associate with that roster. Short theme stings and alert hits from the game are clipped and reused on soundboards because they are recognisable without any visual context. The Hopper ding spread in the same short form gaming culture that keeps the ROBLOX oof in constant rotation, as an instant cue for spawns, surprises and edits timed to a single frame.