Tank Mode

When in emotional pain you dont show any emotion until you are over the situation,

John: She just broke up with me dude...
Mike: Dude that sucks, I'm sorry.
John: Yeah, I'm going into Tank Mode

tank mode

to go beast on L4D in a destructive manner.

Jack Smith: Man Left 4 Dead is pretty fun!

Tyrone LaTrice Johnson: Yeah, especially when you TANK MODE them hoes.