I was too vague. Or too specific. I can't tell.
Anyway, what I was wondering was what do you do with those 2 hours of the session that remain, assuming that getting back into the game with a PC of any sort -- see my OP -- is out of the question. Go home? handg out and watch? Read?
If you are the DM, what do you do when you've got a player who is out of the action for what looks to be the rest of the session? let him sit there like a lump? Engage him somehow?
Or if you are another player, who still has a live, active PC to worry about, but your friend Bob is stuck twiddling his thumbs?