Cloth frame

The magician shows a white covered frame, in the side walls of each is a bore. Through these holes the magician now finds two suited cloths whose tip about 4cm are clearly visible to all in the frame. In between an inflated balloon is clamped into the frame. Now the magician take a piece of cloth whose color is a nice contrast to the other two towels, disappear. Once the cloth has disappeared, bursting the balloon and just missing the cloth is knotted between the other two in the frame. Magic Items are non-returnable.