I watched that special on Myth Busters with the experiment that determined whether or not the plants were affected by the presence or lack of music. The ones without the music looked weak and the ones that listened to heavy metal thrived. They were too lazy though and used a drip system that ended up either dripping too much or not dripping at all for any of the grows and the plants were withering when they came to look at the different grows. That show is pretty cool.