The best (and first) place to do this is when you are taking out the first Ion Emitter. Grab an enemy by pressing
and then using
to point in the direction you want to throw them. Wolverine will automatically throw them. During the fight on the Ion Emitter you will fight more then ten enemies in total, so throwing ten of them off the tower should be easy. If you don't get the achievement here, there will be plenty of opportunities later on in the game, for example when taking down the second Ion Emitter.