One thing I have noticed . . . the rat escapees are not quite unobtrusive as escape snakes. I have at LEAST two distinct escapees haunting the basement, maybe three or one is just that fast.
One in particular has been driving me nuts all weekend and keeps climbing up the back of all the computers and peeking out under my monitor - then diving back into the safety of the tangled mess of cord-hell behind the computer desk. I am about ready to throw a trap down for him or go buy a blowgun and zap him with some curare.
On the upside it gives some small comfort in knowing that any escaped snakes may well come across a suitable meal in their wanderings.