We all have our own little party tricks and Keira Knightley showed hers off on The Graham Norton Show today. She can play Raindrops Keep Falling on My Head using her fingers and her teeth. If you close your eyes, you can actually hear the Burt Bacharach tune. Pretty impressive.
Although, I do not recommend trying it at home or at parties because it hurts. I know I should have started with that line because you already flicked your finger on your teeth and are feeling that weird sensation.
Therefore, from now on, do like Dolly Parton and just plays your nails like a washboard. I promise you there is no pain involved with that. Plus, it sounds really cool when you finally master it.