Tomomi Sayuda¡¯s iBum chair will antomatically photocopy your ass, when you sit this chair. When audience sit down on the chair, a scanner on the top of chair to scan people's buttocks antomatically. Then the scanned image is printed out from the right hand side of the chair. A sensor is detecting people's existence all the time. So people will not realize the existence of the scanner. Without notice, the photocopy of the bum will arrive next to the chair.