I agree that outright folding would be a poor decision. I don't know what a LAG is, but it sounds like a term for a Bad Player. Just because he bet at this flop doesn't necessarily mean he hit his hand. If he had check-raised the flop, then I'd be worried. Yes it does appear dismal, you are behind any pocketpair AA-99, AK-A9. And you ask yourself what could he POSSIBLY have? Well, a low or middle pocket pair is quite likely, and i've seen players cap pots with 24 offsuit. Definitly give a call here and see what pans out on the turn.