Place this clip right after the cake-drop moment in your timeline, then follow it with a bruh reaction for the stunned pause before cutting to a yaaaaay cheer from the crowd pretending nothing went wrong at the party.
About this sound
This clip is a male voice singing the words happy birthday to the ground in a flat, deadpan delivery, lasting just under six seconds. It feels absurd and gleefully disrespectful, turning a cheerful birthday wish into a joke about rejecting the celebration completely and letting the cake end up exactly where the singer wants it.