In the scene where Richard Gere asks his ex what went wrong, he is playing the piano, but if you watch the inside of the piano, the strings aren't moving! When you hit the keys on a piano, they hit chords inside the main base, and in the type of piano in the movie, you can see the inside chords, and they aren't moving!
Do you mean the hammers in the piano that hit the strings? Ever try to pluck a piano string. They're pretty bloddy tight. They vibrate. Not easy to see a string vibrate. Just curious if you meant that you didn't see the hammers striking the strings.
Kodiak
Actually, Richard Gere does know how to play instruments like the piano and guitar. He also played the piano in "Pretty Women". So that's not really a slip-up.