There is no documented source for this clip, which appears to come from a user-generated soundboard library where it picked up the odd title 'waterday motorcycle'. Short engine revs like this one circulate widely online because they are endlessly reusable: creators need a generic bike sound for transitions, pranks and vehicle gags, and a clean six-second rev does the job without any backstory. It survives on utility rather than fame, sitting alongside other one-shot vehicle and comedy effects that editors grab whenever a scene needs speed, noise or a little attitude.