From a style perspective, it's a funny way of attacking.
However, you can't add together three attacks like that to make one uber attack. At best, the first 'attack' (the leap into the coat) was actually a maneuver, the second 'attack' (the launch into the coat) was likewise a maneuver, and the final 'attack' (aiming the coat and launching the werewolf) was the actual attack, with the two maneuvers tagged for a +4 bonus (rather than, in effect, a +14). Or, as another option, the wizard might be using the werewolf as a projectile (which would probably count as an attack against both the wolf and the target) followed by the werewolf immediately attacking upon impact (ie, two seperate attacks, probably with the werewolf's attack benefiting from the 'maneuver' he made jumping into the coat).
