There's this one classic kill I got in a LAN party for CS 1.6
In the map CS_Assault, there's a vent at the top of the warehouse building in the level. There's an "upper level" to it with a short ladder leading up to it, and it leads right to the hostages so the terrorists generally camp there. Bored of getting killed in firefights so much, I switched to an AWP (sniper rifle) and went inside there, aiming my crosshairs at said ladder. Finally, the last guy on the enemy team had a pretty good idea I was in there. So, instead of just coming up, he threw a flashbang in front of him. I got hit square in the eyes, and couldn't see anything. My thought process afterwards:
"Aw, dangit! He got me.......wait...if I were him, what would I be doing right now?"
After a moment's delay, I fire the rifle, completely blind. I don't see anything, but just hear from across the room "WHAT!!! WHAT THE FU**!??"