Anyone else here shredded their belt?

I was heading home with the girlfriend yesterday and notice my battery light came on, then my A/C went warm and I lost my power steering and heard the most horrid squeal come from the motor and smelt burnt rubber and I knew right away what happened. The tow-truck driver put the car in the garage for me which was cool. I wouldn't have had it towed if it wasn't free (gotta love AAA)

anyway . . .
I opened the hood to find shredded belt tangled up all over the place and the tensioner pully was just dangling on the bolt. AFter picking pieces of the belt out of all the accessories, I took off the tensioner pully. The damn thing was mangled and the bearing fell into a million pieces onto the garage floor and the balls bounced all over the place. The whole thing was blue from the heat.

Has anyone had this happen? I don't know how the tensioner pully could go like that It was making noise for about a month but I didn't realize it was the tensioner making the noises in there.

Well I fixed in in like 20 minutes, it was only the pulley, the bearing just seized. I got a new one and it looked just like the stocker and it's metal. It took all that time just to get the pieces of belt out from behind the alternator pully. The bolt isn't reversed though, I use a socket to turn it to get the belt on and it tightens it. I was just wondering if it was a common problem cuz I really would hate for that to happen on the highway or something.