Your right that he could of played it like that Mrm but in fact by showing weakness with his AA he actually got a lesser hand to think it was in front and put a whole lotta chips on the table. Maybe it was tactical genius from A.M.P
The point is you have just lost $100 by being unlucky but I agree with MrM that there might of been an opportunity to take the pot there and then but more or less all your chips were in ahead.
To be honest with such a massive raise by him I would of folded as Ive quickly learnt AA is just a pair and thats all, but you made the right call as you were in front.