An optical distance sensor which is featured by precise measurement and simple constitution is mounted on, for example, the welding torch of an arc-welding robot.

At the same time, take your hands and make a golden "arc welder" or "plasma cutter" jetting out of your fingers, and start to slice through the metal where you feel it.

Create an arc welder (super hot, sustained burst of laser like gold flame designed to cut metal) with your hand or finger/s and cut through the part connecting to the body.