I'd been playing Tremulous for about a week when this happened.
I joined a game on tremor, as an alien, which was going catastrophically wrong. The humans were S3 and we were S1. I managed to get a four quick kills of unarmoured humans and had to make a choice. I took a look around the base, with the main door being assaulted by battlesuited luci troops and decided to just go for it.
I reckoned that most of the hummies were out of their base, so I bounced my way to the back door of the main hummie base... jumped the guns and, sure enough, it was deserted but for one builder. At this point, I made a mistake. I should have killed him first, but I went for the telenodes. After finishing them, and there were still no hummies coming back to defend, I went for the reactor (should've got the armoury, but that was another mistake I suppose).
I sat on top of the reactor and raped the shit out it while hummies charged back into the base looking for aliens. Finally, one spots me and starts firing a luci. After three shots I get killed... respawn evo into a mara and head back to the base... sit on top of the reactor again. The same guy who spotted me before sees me again and starts firing, but this time I finished off the reactor. I team-shout "REACTOR DOWN. ATTACK" and 20 seconds later, the dretches and basis that were being slaughtered swarm into the base and finish off the bemused humans. Lots of shouts of "who deconned" etc.
I'm pretty lame usually... but that day I WAS A GOD!