First thing that comes to mind is draw or monster. If you don't have a read and there isn't much dead money, it's an easy fold. Even giving him a pretty wide range of drawing hands, you're still behind:

Board: Th 9h 8s
Dead:

equity win tie pots won pots tied
Hand 0: 42.337% 41.26% 01.07% 14706 383.00 { QcQh }
Hand 1: 57.663% 56.59% 01.07% 20168 383.00 { JJ-88, AhKh, AhJh, Ah8h, Ah7h, Ah6h, Ah5h, Ah4h, Ah3h, Ah2h, KhJh, QJs, T9s, 98s, 76s }