I thought I might share a shock I had today. I went to work at 8 this morning and accidentally left one of my Sony MDs on the passenger seat. I also happened to park in a location that put it in direct sunlight. When I went out for lunch a little more than 4 hours later I found the disc so hot I could not even handle it. I had to hit it into the shade to cool off. I didn't see any physical melting of the plastic so I popped it into the player. To my surprise it suffered no damage! I played all the tracks from beginning to end without a problem.