Pet Rat Reponse....

of course people have pet rats, lol.  my boys just died a few months ago, but i've had rats since I was a child.  They're very loving social creatures, and are just as intelligent as dogs (they can be trained).  They also have very distinct personalities.  sounds like he's a blue harley or a blue rex (rax's can be a bit lethargic), you can save him from the wilds if you'd like.  I'm sure he's hungry or at least would appreciate food, if you have any cheerios, lettuce, nuts of any kind, anything really, I'm sure he's really love you if you gave him a cookie.  Anything but dairy foods and meat (they can eat it, but sticking vegetarian/vegan is better for their diet and temperament.  give him small pieces and see if he'll come up to you.  overall he should be pretty harml ess, but still be wary, he can still bite.  good luck!