Hmm.... I think that my funniest kill was when I was on Xboox Live in a Team Snipers match in Terminal. I jumped into a booth in a garage and told my buddy to come here. There are no radars on Team Snipers, right? He ran past and I noscpode him in the face by accident (itchy trigger finger) and it blew him back into a wall. He was like "What the hell man, I'm not a blue queer, see? Im red!" and I said "Sorry, man, you shoulda told me that you were there."
The second funniest kill I had was also on Xbox Live, when I was on Sanctuary. It was a Team Slayer match and I had a Sniper Rifle. I was running around, because my people were camping the Sniper spawn points, and the other team was in hiding. I see a red dot on my radar and flip around just in time to noscope a guy who had lunged at me with a sword in the face at the LAST second. He flies back into a corner and falls on his knees and leans back, his arms outstretched and forces himself deeper into the corner. His body starts fiercely jiggling, like he had been electrucuted by my Sniper round. Ever since then, on Xbox live, my friend, Burrito Jimmy, had called me Lightning, which spread to my other friends.