Come up with a plan to help quell his beastly urges before nightfall

You think long and hard about what you can possibly do to keep him from eating you. Several ideas pop in your head, but they mostly involve harming the grandfather, and you don't want that. Finally you get a rather good one, and ask, "Do you have a bow and arrow I can use?"

The grandfather's head springs up, and he asks, "Um, sure, but why?"

"I need to do some hunting." you respond as you slowly get out of bed, quite weak.

"Hunting?" he asks, "In your condition? You can't, you have to rest."

"I'll be fine. Please."

With a sigh, the grandfather walks to the back room of the house, and comes back with a bow and some arrows. "Here. Don't overexert yourself."

Taking the bow from him, you say, "I won't."

Mustering up your strength, you get to your feet, and head toward the door. "Um," the grandfather starts, "you might want to put on some clothes first."

You look down, and notice that you're naked.