No he didn't arm it and not finish it off. As in, the last few seconds of a game. Bomb Armed........ not planted? NO WAY. Or maybe, bomb armed, aarrrrggh! Hit in the back. The bomb returns without anyone else touching it. No not like that at all. It was more like....

Containment:
Bomb Armed!
::Gruesome runs through the teleporter with it instead of to the bomb spot::
::Gruesome dies with the bomb outside the teleporter::
::Oppossing team is genuinely confused + their player who is never in the right spot at the right time just somehow got a medal for killing the bomb guy::
::We all rag on gruesome::
::gruesome sucks his thumb::