The FBI Open Up gag is one of the internet's longest-running raid jokes, picturing federal agents bursting through a door mid-stream or mid-video. It spread through YouTube parody sketches, gaming montages and reaction memes in the 2010s, then found a second life on TikTok and in livestream soundboards. The shout works because the premise needs no setup: three words instantly signal a bust. That simplicity keeps it in rotation years later, usually as a fake-out intro or a punishment cue for caught-out characters.