He doesn't have a clue, but he's not about to give up so soon. If this doesn't work out, he can at least say he tried. Well, say being objective here. He doesn't know when's the next chance he'll have to say anything if he can't figure out a way to turn back into himself.

He grabs the paper out of her hand first, taking a small chunk out of it with his teeth and lets it flutter to the ground in front of his feet... Good enough. He spits out the little bit of paper in his mouth and grabs the pen next.

Now he just has to... uh... that is... hmmm. Well this is going to be a lot harder than it looks. Moving the pen about in his mouth until the inky end is held out the side of it, he lowers his head down towards the paper, and tries to drag it along. He makes one large line and the paper starts shifting.

... Damn.