From Laughter Yoga to Out-of-Context Laugh Tracks

By: Rachel Bowman - Published: Aug 22, 2009   Updated: Mar 24 2011
It's said that laughter is the best medicine, so why not take as much of it as possible? Here are 10 laugh-worthy inventions, which include everything from laughing rocks to laughter as a workout. So laugh it up and (maybe) lose some weight in the process!