I can't believe no one thought of this before.
Damn, I have no way to post one of these myself. I just thought of one about the only way to beat Potemkin... and got an image of a spy uncloaking behind him.
Pot needs a sandwich so he can regain health during the round.
*Stops liking Call of Duty 4*
I seem to play with a lot of people who are trying to earn this these days...
http://tf-2.fr/ach.php?a=You Do The Hard Part!&b=Be responsible for a loss by refusing to support your team.&c=3&d=50&e=1206&f=1