Hypersmurf
Moderatarrrrh...
... This is the problem - PC3 can't actually activate his greaves until the move is ALREADY MADE. They're an interrupt, activated in response to PC3 being pushed.
Right. See my edit to the last post ("Essentially...") - he moves east, he can't end his move there, he has insufficient movement to reach a legal square; his move ends in the last square he could occupy.
He gets shunted back out of PC3's square after moving into it, and that's where his move ends.
The general rule is that he gets shunted back until he's in a legal square. In this case, it's only one square back. If he didn't push PC1, though, it's three squares back.
-Hyp.