[RobGW]

When you raise PF and bet out when an Ace comes on the flop, your representing the A. Most of the time he wont call unless he has the Ace himself. So if he calls, there is a good chance he has the Ace or sometimes he has a lower PP and doesnt want to believe you. Then you check the turn and hope to check it down. If he bets, he's probably got you beat. If he checks behind you probably still have the lead. That's where things get interesting and develping reads and such come into play. But the flop is a standard bet when heads up.