Are they buying in short or just got pushed down to short? Either way they are fish, but that is a big determination regardless of how many BB's. Check their VPIP/PFR. If they are ~10/10 or so which I see often, then they will probably be on TT+, AK. Better off just folding anything that isn't beating that range(you know what that means).
If they just been spazzy as hell, anything over like 40/30 then there is a good chance that they could just have two paint cards, you see that often. I wouldn't take into consideration that they are in a hurry to leave the game because that doesn't play into this at all unless they said in the chat something like they are leaving in 10 minutes.