http://news.bbc.co.uk/1/hi/england/7870141.stm Laughter is the best medicine and it has been known for centuries that laughter uplifts our spirits.Laughter yoga combines laughing with yogic breathing exercises. Laughter is done without any reason. http://www.laughteryoga.org/ . http://www.motherearthnews.com/Natural-Health/Healing-With-Humor.aspx Now we also know that laughter stimulates endorphins where as stress stimulates cortisol hormones. Here a BBC report shows people in Kent (UK) using laughter. A therapist from Oswestry in Shropshire (UK) has also been using a didgeridoo (sound healing) to treat clients with a range of problems from back pain to stress.