The clip comes from The Lazer Collection, a series of animated shorts by DominicFear first uploaded to YouTube in 2007. Inspired by Dragon Ball Z beam attacks and the Shoop Da Whoop face, characters would shout the line before firing a huge laser from their mouths. The videos and catchphrase spread widely on forums and early YouTube, becoming one of the defining memes of that era. It remains popular in remixes and soundboards because the shout instantly signals an exaggerated laser joke.
About this sound
The Shoop Da Whoop I'm firin my lazor sound effect from the classic Lazer Collection meme, used for over the top beam attack jokes and reactions.
This is the drawn out charge up and blast from the Shoop Da Whoop meme, starting with the shouted line before a huge mouth laser fires. The voice is distorted and deliberately overacted, rising in volume until it cuts into a loud, bass heavy beam sound that fills the rest of the clip. It works because the build up is instantly recognisable and the payoff feels absurdly powerful for such a silly face. Viewers expect something epic, so using it for a tiny or pointless blast makes the moment land as pure slapstick.