OHHH MOTHERF.... THAT WAS ME! I COMPLAINED ABOUT THAT! THAT WAS MY STANK! I WAS TOTALLY CALLING HACKS AND JUNK TOO!
Thanks for bringing it to attention. I actually feel less like trash now that I know it was SOMETHING. Someone told me it was timed c4 and I said that I was stealthed not them so how'd I miss it?
EDIT: AWWMAN, kenz is right, if you use console "ghost" to clip through floor, then "walk" to unclip, you will fall through the floor but not be slain by the lava. I guess it doesn't have a damage volume... hmm...
Angryscientist also complained.
It's not a c4, otherwise i should have seen that on irc .