Suppose two players are fighting, and one of them has the Staff of Provocation (PHB2):
Power (Daily ✦Charm):Free Action.
Trigger: You hit an enemy with an attack power using this staff.
Effect: One creature of your choice makes a melee basic attack against that enemy as a free action. The attacking creature gains a bonus to the attack roll and the damage roll equal to your Intelligence modifier.
Can the player use this power on his opponent, and choose the opponent makes the attack against himself? Can he use this on his opponent, then choose himself to make the MBA against his opponent?