Has your long-held habit of carrying a baby grand piano with you everywhere you go begun to cause irreversible damage to your easily pliable spinal cord? The Monday Night Crew gang discovered an easier way to tickle ivories touchscreens on the go by using a neat trick in the "Graffiti Mode" on your DSi. Basically, the music note stamp in graffiti mode makes a sound that changes pitch depending on where you place it on the screen. By placing these stamps over a cleverly crafted grid, you can wow your friends with MIDI renditions of your favorite songs. It's a neat trick, and far less damaging on the ol' sacroiliac. Check out a video demonstration after the jump!