RAT or MOUSE

Not sure if it was a rat or a mouse, in fact I'm not sure what the difference is. But the other day when I was walking around in BJ's buying a bunch of food for WinterFreeze I saw that little baby rat/mouse walking around. I was wishing I had a camera phone at the time, but I didn't. I found a maitenance guy who was working there and showed him so he could take care of it. I thought he would pick it up or get something to pick it up....well he walked over to it and picked up his foot and then slammed it down on the little thing. YUCK! Later I saw him at the front of the store..him being the guy, not the mouse. He said, You are lucky you weren't there for the final! Not sure what he meant by that, but man that was sick and funny at the same time.