one time we had this old man as a sub teacher he like 50 or something, anyway we had him as a substitute in science our teacher was like sick or something. He brought this video on DNA and shit for us to watch on the TV and he pauses in the documentary and tries to explain something to us and then he decided to get a permanent marker like a white board marker and draw on the tv the explanations and diagrams.
long story short the TV screen has squiggly lines all over it now that won't go off.