Serj Tankian is best known as the lead vocalist of System of a Down, a band recognised for abrupt shifts in tone and energy. Short vocal exclamations from rock singers often get isolated on soundboards because they work without the full song, and this woo has spread in that format across meme edits and reaction posts. Its appeal comes from the contrast between the singer's serious reputation and the playful, almost cartoonish brevity of the shout, so creators reuse it as a standalone burst of excitement.