I used to have a lovely paperweight on top of the TV (in the days when TV's were wide enough to put something on them). I really liked it until one day I came home and the sun had reflected through it and burnt a hole right through the top of it. I couldn't believe it. I was probably very lucky that it didn't start a fire to be honest.
My mother decided the goldfish bowl should be placed on the TV until my father pointed out that she was probably gently broiling it.