I've got a mole on my face the size of a baby's thumb. I need your hungry rat to gnaw it off. Your rat needs to be really hungry, as I'm hoping to make this quick. Also, you should have a leash on your hungry rat, or it should be well-trained, especially if it's a vicious hungry rat.
I'm not offering any money for this, since it's a win-win situation. Your hungry rat gets a full belly, I don't get stared at on the bus by small children anymore.