Beethoven's last movement.
Fingerprints.
Click here to find out the answer.(http://www.reddit.com/r/Jokes/comments/2b57xv/howdoyoukeepanidiotbusyforhours/)
Because he was Haydn.
They weren't invented yet.
That's nice. Mine's a light shade of brown.
Artificial Intelligence!
Pollution.
Steam. I'm so sorry.