The first audio CD demonstrations were also like that. People drilling holes in the discs, smearing them with ketchup, etc., to show how reliable the system was. At least the next 15 seconds…
I remember the first time I heard a CD skipping. It was at my uncle's house. Someone came to him and said hey, the music is skipping. He said CDs don't skip. The other person said, well... whatever CDs do, it's doing that.
I really appreciated the irony of stereos (particularly in cars with subwoofers) which were loud/powerful enough to cause the CD skip. So, in a sense, the CD was causing itself to skip.
