The way I see A2s is that all I'm giving myself is a nut flush draw (unless flop comes 22x). As far as pairing up goes I've only got the Ace, everything else that hits the board is an overcard to my 2. If the board hits my ace I'm certainly dominated at a full table. That's how I've learned to dump Axs because it only gives me 1 way to to the nuts. So I may play it for a limp and see if I hit the flush, but calling all-in with it will almost always be a mistake.

But like ensign_lee said, if he was stealing this was probably a good hand to keep him honest with. Otherwise, look for a better spot to double up - preferably where you can be the one pushing. Just my .02