Wind Prison Question

[Tomicroll]

If a power has an effect that triggers on the target moving, does the movement have to be voluntary? Wind Prison states, "When the target first moves before the end of the encounter, each enemy within 5 squares of the target is knocked prone." If the target is pushed, pulled, or slid do the other enemies get knocked prone?

Thanks,
Matt

 

[keterys]

The movement does not have to be voluntary. That will knock them prone.

Of course, it's more amusing to make the target do it