Wow, Blackcosmocat, I'll bet that was startling! I had a squirrel do the same thing to me recently - not sure what it was looking for since it already had a peanut in its mouth.
I like rats - have had quite a few as pets - but even I would not want a wild one climbing on me - particularly if I didn't expect it. I was watching the rats across the street again last night - finally a few people noticed them as they were walking by, and after I was lying in bed I heard a couple of women squeal and yell "Oh my God!" So I guess there will be more people realizing that life in the city is wild! Or is that, wildlife is in the city?