Today I found a CD in an unmarked case by the side of the road.  I picked it up and looked at it.  I decided to take it home and play it to see what was on it.

Later that day, while at home, I put the CD in my CD player and pushed "play."  It didn't play any music, it just made a lot of irritating screeching and shuffling noises.  It must have been a CD for a computer, not a music CD.