Wha?!

Cooper: Can I climb on your shoulders?
James: Not right now. I need to go and help a friend move something heavy.
Cooper: What are you moving?
James: A radial arm saw.
Cooper: What's that?
James: Its a big saw. You use it to cut wood.
Cooper: And it has a piano attached to it?
James: um. no.
Cooper: OK. Never mind then.