Yup, time to fire up the power washer... I like cats fine, but they are generally not the brightest creatures on the planet. I'd be bummed if it happened to my cat, but I would not be surprised.
Story reminds me of a buddy of mine in college. He showed up to the student union one winter morning looking a little bothered. Asked him what was wrong, and he started up his car, and a cat was in the fan. He described the sound, and said what a mess it was. He said he had to use a stick to get some of the cat parts off, and out of the way...
A couple months later, I accidentally ran over a flock of birds, and they got sucked up into my fan. I was glad I remembered about using the stick; yuck!