The line comes from The Dark Knight (2008), Christopher Nolan's Batman film starring Heath Ledger as the Joker. In the scene the Joker is amused rather than angered by resistance, which became one of the defining traits of this version of the character. Clips of Ledger's performance have circulated for years on video platforms and soundboards, with short quotable moments pulled out for reactions. This one endures because it works without context, a complete villain reaction that creators can lift into gaming, movie and meme edits.