Circa wave 3 or so, this guy, a level 2 Commando, joins late and realizes after accidently shooting us (me and the guy already there) a few times that friendly fire is on. Without a word, he then goes on to start shooting me in the back with his bullpup. Again, he says saying nothing so we had no clue. I assumed he was just being temporarily 'tarded or just really sucked at aiming. Being a level 6 Berserker, I could took it like a boss and slapped him a few times with my katana. Self-heal, back in action.
At the following trader wave, I arrive first, purchase armour and start contemplating what off-perked weapons I wanted. All of a sudden I hear my character cry out in pain and I think, "what the..." This guy now unloads a magazine into me INSIDE THE TRADER. It was clear he was picking a fight, so I decided to oblige him in the simplest way possible. A straight up battle between level 2, un-armoured Commando with nothing but a Bullpup and a Level 6 Armoured 'Zerker with a Katana; you can guess how that went. It definitely didn't help that I started on him just as he began a reload. Poor bastard hardly got 5 shots off in the next mag before I took his head off.
He promptly called me a f*ggot and left. Honestly, it was probably the most satisfying thing I've ever done in Killing Floor. Or any game for that matter.
Another death I witnessed... and helped cause, was the death of my mate during a game of offices. I had an M32 and was helping him on crowd control. I fired a single grenade into a group, then out of f*cking nowhere this Siren flies out and lands perfectly on his head. Needless to say the panic it caused him and the crippling laughter it caused me lead to his swift end. He almost ragequit. I feel kind of bad but it was still hilarious.
As for my own funny death, off of the top of my head the best I've had so far was on solo Suicidal. Patriarch wave on Crash as a Level 6 Demo. I've set up ~16 pipebombs down the corridor with the grate and a trader (hard to explain) with all the time and money I had to spare. I was holding another 8 that I was gradually putting down as the Patriarch spawned. It looked like he would come from a particular direction, but as usual, he didn't. I began to panic a little, trying to figure out where he was coming from. I start checking both sides and as I go out the door to the right of the trader...
"ONE IN THE PIPE!"
I literally screamed in terror-- I was standing right over a pipe bomb next to a wall. There was no way he would miss it with the rocket's explosion. Normally, I'd just duck out of the way. One pipebomb lost to a rocket? Pfft, big deal. Might take some explosive damage? No probs, I'm a level 6. The problem was that this pipebomb was close enough to set off a chain reaction that would detonate all of the pipebombs I already placed. In vain, I ran back over my minefield, screaming for my life and experiencing a terror I've hardly felt before.
It was the loudest sound I've personally heard in this game to date. I lost all of my limbs sans my head and flopped to the floor like a dead fish.
If we could talk about the death of specimens for a moment though, the best Patriarch death I've ever witnessed was on Arcade Gas Station. Patriarch spawns in a dark place, we don't really know where. My friends and I are panicking, trying to set up the car wash to kill the Pat for sh*ts and giggles. Literally two seconds after his animation finishes, we hit third-person zed time. Turns out, the poor f*ck got hit by the car and died. Don't know how, don't know why, but we all pissed ourselves laughing.
A few more hilarious stories from Gas Staion:
We had a Fleshpound get hit by the car but not die. It was the even funnier than the Patriarch death to see the Fleshpound zoom by on the hood of a police cruiser.
On the way out of the trader, I was busy talking to my mates and didn't realize I was in the road. I turned to my left see the car coming straight at me. I jumped so bad I smashed my mouse against my keyboard and lost all control for a moment. Luckily I ended up backpedaling away just in time to survive. I was almost in tears though from screaming/laughing, watching my life flash before my eyes. My mate got a real kick out of it though: he watched it happen clear as day.