Sans is the laid back skeleton brother from Undertale, the 2015 indie role playing game created by Toby Fox, and he became one of the most parodied characters in gaming memes. Animator Sr Pelo built a following on YouTube with frantic parodies and extremely loud voice performances, and his take on Sans turned the character into a shouting joke. Short clips from those performances spread through meme edits and soundboards because the voice is instantly recognizable, works without context, and can turn almost any setup into a punchline.