TV Trope: Ironic Echo
Enemy #1: Welcome to Greendale, you’re already accepted?
Enemy #2: Losers.
[Two paintballs shoot through the Dan Harmon cameo poster and hit them - Annie, Abed & Shirley bust open the door]
Enemy #1: What the hell?
Annie: Welcome to Greendale.
Abed: You’re already dead.
(2.24 For A Few Paintballs More)