I was playing on a server the other day, the map was ns_bast. There was a gorge at feedwater control plodding about and my friend started to shoot it with his hmg. Blood splattered the walls and it didn't die. It ran round a corner and then came straight back out firing, my friend shot it a load of times with hmg, blood but it didn't die. This kept happening until in killed my friend. I've played ns since it got released and know that how much my friend shot it, it should have died. From the really short time it took for it to run away and come back defence chambers could not have healed it enough. It was definately the same gorge each time.
I'm posting it a bit late because just a second ago somebody said that they had the same problem with a skulk. Are we the only people who have had this happen? Or is this a bug/cheat?
Edit: Sorry about the misspelling of "Invincible" in the title, your damn game and the lack of slee... zzzzzzzzzzzzzzzzzzzzzz