Cat Training Device - Keep Cat off Furniture

Despite evidence to the contrary, cats CAN be trained... Sometimes it's not easy. Remember when you were a kid, and your mom or dad told you, "Don't let me catch you doing (Fill in the blank)?" Well, my cat seems to have absorbed that lesson very well. I can't catch him on the kitchen table any more, but I know he's been there...
Here's a neat idea. This device is spring-loaded using a short length of bungee cord. A light touch will trip it, causing it to jump up in the air and make a noise, ho