bottom two, scary turn card

Turn: (t600) T[img]/images/graemlins/heart.gif[/img]
<font color="red">Hero bets 400</font>, Villain raises to 1885

He jams. Pot's 2885, and its 1485 back to me.

Do people really jam their Ks here? What hands that I'm ahead of do people jam here? If he is jamming a K, or a better two pair, I've got 4 outs (or less, hell, he could easily have a J or a Q) to improve. And I'm only getting ~2:1.

Do I fold this, or is he full of it enough that I'm justified in calling? I think this is an obvious fold, with such a horrible board.