This is a normal raised pot, right? I'd just call down. Since he's a little spazzy postflop I think there's enough worse kings, second pairs, and air in his range to simply call him down. If he checks the river I'd probably jam and expect to stack him most of the time.

pot/pot/pot is the good player's value line and the bad player's bluff line. So I wouldn't be surprised if he barrels all-in with something much worse.