Ludwig van Beethoven
A couple visiting Germany were touring a cemetery looking at historical headstones. They began to hear classical music which they identified as Beethoven's Ninth Symphony but it was being played backwards. As they searched for the source of the sound it changed to Beethoven's Fifth Symphony also being played backwards. They finally found the source of the sound as coming from Beethoven's grave. Intrigued, they called over the tour guide and asked how come the music was coming from Beethoven's grave and why was it being played backwards.
The guide said, "Nothing to worry about, it's just Beethoven decomposing."