Beast Boy is a DC Comics hero best known from Teen Titans, famous for turning into green versions of any animal at will. The phrase he has Beast Boy powers became a shorthand online for explaining any strange transformation in a video without needing context. Short clips using the line spread through meme edits, Discord soundboards and reaction videos, where the exaggerated delivery does the comedic work. It remains popular because the reference is instantly understood by cartoon fans, while the scream alone still reads as pure surprise to everyone else.