The ba-dum-tss rimshot comes from live comedy drumming, where a drummer punctuates a comic's punchline with a snare hit and cymbal crash, a tradition rooted in vaudeville and stand-up clubs. It migrated to radio, television laugh cues and eventually meme soundboards, where its one-second runtime makes it perfect for short videos. Today it is shorthand for a joke landing or gloriously failing, sitting alongside other comedy reaction sounds like the oh no no no laugh in every prankster's toolkit.