Possible Parasite, Illness?

So my ball python has a violent BM, by violent I mean he was thudding around and lifting his hide off the ground a couple times, and making a very very loud noise which I don't know how to describe.

Anyway, the result was this: http://i556.photobucket.com/albums/s...289/BP1234.jpg

This does not look normal at all. This was a few days after his last f/t rat. Was there possibly something in the rat?

Yeah, I would take a fresh sample of whatever he produces next time in to a vet, and have it checked. (It may have nothing to do with his last rat, it could have been anything before that, too).

The last rat he ate was in the refrigerator for 2 days before he ate it. I put it in there to thaw, and didn't feed him that night, and fed him the next time. Is it possible it went bad during that time? I smelled it before giving it to him and it smelled like they always do.

If it was in the fridge then I doubt that it went bad.

That would definitely send up some red flags. but like aaron said if it was in the fridge is shouldnt be a bad rat and do what donna suggests. I might even call a vet tomorrow if it was me and ask a question about some strange looking poop.