Yes, that is a mouse snapped in half by a mouse trap. I was very surprised to see this at the moment because I have never seen anything like this before. I am very glad at the same time that one of 2 mice that has been stressing me out throughout whole winter break is gone from this world. They have been scratching inside one of the chair in my dorm (Mingus hall 1-108) and inside radiator. I feel relieved.