More a set of kill, but anyway.
We were playing in that one custom map, that just a single round room, with res spot at each end. Melee weapons only, which is always fun there. Well the inevitable happened and people started shooting, I soon got bored of this and said something along the lines of if people are going to spoil the game im just going to leave.
Was just about to log when some guy starts seriously bad mouthing me about this, so I decide what the hell, switch to pyro and start butchering him.
Get a "GG mouse+w", so I switch to medic and start completely making him eat his own words. Needles fly, bone saws rip at his flesh, and I just continuously kick his ass until he claims he is too good for this server and leaves.
Was so satisfying, and I have not played tf2 so well before or since. I was like the hulk, and he did not like me when I was angry. Good fun.