From "The Walking Dead: Remember (#5.12)"
Aiden! What is going on?
Guy's got a problem with the way we do things. Why'd you let these people in?
Because we actually know what we're doing out there.
[Aiden throws a punch, misses, and Glen knocks him to the ground
[Aiden gets up ready to fight, but Michonne gets in his face
] You wanna end up on your ass again?