The 2nd level Wizard Utility 'Simple Animation' has the following specification:
Target: One Medium or smaller object that is not fastened in place or held by a creature
Effect: The target animates until the end of your next turn, and you slide it up to 5 squares. While the target is animated by this power, you can move it farther by sliding it up to 5 squares as a move action.
Unlike several other object-targeting powers (such as the special for Disintegrate) that specify the object must be unattended, this spell only says it must not be held. What would happen if you cast it on a rug beneath a creature's feet? On someone's hat? Are these considered 'held'?
What counts as a target for the purposes of Simple Animation?
Secondarily, if those are not valid targets, does the spell have any combat applications beyond moving a single piece of cover?