it seems tougher than usually .. if he had a queen off the flop he checked top pair with the flush draw.. and ended up catch quads .. if he had the flush draw it seems more sensible on the turn cuz that second queen could scare ur A's .. the 3rd queen seems like a helper to u.. he he hit his flush u hit ur top boat on the board... personally with all things considered i would say call .. but that is leavin the fact that is online poker and he could have the quads... the only other thing i could think of is he had pocket 5's or 3's off the flop.. which then still u hvae the best hand .. but decent lay down can't fault u for it .. its a scary board