88 or 99 was my thought too - I would never play that hand that way (pushing the turn with it seems pretty terrible), but plenty of players do, even ones that haven't been especially bone-headed before. So it seemed like a reasonable guess. I also thought there was a chance he had a flush draw turned combo draw, maybe 89 or 68 of spades, or something along those lines. And I thought there was a reasonable chance he had 22 or 77, although he really doesn't need to push there if he has those hands - calling is almost certainly better with a loose player yet to act and a flush draw sitting out there.