Love Hate Punch is
an interactive work of art in the form of a punching bag audience
members can take a whack at. When at rest, the bag emits red light.
When you hit it, light effects appear at the place of impact, flashes
that goad the boxer on. If you try hard enough, you can continually
change the color of the bag.
The artists: "We made this work because we had enough of all those shallow and balmy emotions evoked by LED lighting. We wanted to entice people to become physically active in a museum."
More photos at http://www.stefangross.nl/fotos_love_hate_punch.html