Lashing flail (Martial Power 2, pg.143):
Whenever you use a flail to hit an enemy with a melee basic attack, you can slide that enemy 1 square.
If an enemy tries to move past me while I have this feat and a flail, and I hit them with my OA and slide them 1 square back the way they came, does it still get the rest of its movement (which could be 4+ squares remaining)?