My most recent memory of such a situation is with LittleBigPlanet. I was crying due to laughing so hard to the point where I could not see anything going on in the LCD's screen. A friend and I were trying to succeed on the Bunker level, seeing if we could make it past that god damned wheel of sackdeath and we just died over and over again.

The death animation by electrocution, the ridiculous amounts of times we tried to do it, the sounds the poor Sackboys made, everything just came together to make it a memorable and extremely funny experience. Granted, I laugh out loud a lot when I play LBP because most things in that game really are hilarious, but that one time just took the cake.

Alas, we didn't meet with success. The next day, however, I made a few tries and was so unbelievably happy with myself when I finally completed the level! I don't think I'll ever ace that one... Fear. The. Bunker!

@ spedfrom, what's even funnier is slapping your friend off the edge just before you get to the end

Killing the whole opposite team after the rest of my team dies in Gears of War 2.

That would be real fight worthy! :p

Some of my best memories are in CoD4 domination mode, winning a 200-0 match in shipment. Another was a sweet 200-5 win in Overgrown, we started on the barn side, i had made it through the middle house on the field side and killed 5 guys all in a short time before they could claim the flag. Drop the airstrike and had a Heli before they had any points. We then went on to corner them by the gas station with 3 guys on the center house with snipers and continued to spawn kill them until the game was over.

Winning in sudden death in SSBM or SSBB after I have been star KO'ed and a bomb spawns aboves my buddy's head, he dies, and I win just before I turn into a star.