"HEY!" Activated Car

My idea is a simple voice activated pull-back-action brick. The brick can store energy like any other pull-back-action brick but will also lock in place. When someone shouts "HEY!", the spring is automatically released and the vehicle takes off to the rescue. I think that the"HEY!" from Lego commercials is the most distinct noises in Lego and there is no better way to integrate it into the toy. This would be an amazing way to evolve the way we interact with Lego because it can make the experience of play more exciting without adding complicated motors.