EnterTrainer
I saw this and thought it was a joke. I showed it to Sarah and she thought it was the greatest thing in the world.
The EnterTrainer, which sells for $139, is a heart monitor that links up to your TV. While your heart is beating at a certain rate it keeps the TV on and normal. If your heart beat starts to slow down, the EnterTrainer drops the volume of the TV and eventually turns it off. The whole thing is wireless and can be synced up to a tredmill, bike, weight machine, or free weights.