Funny bone is also known as ulnar nerve under our armpit. When we tickle someone's arnout, it can easily make them laugh because of it.
The longest laugh ever recorded by Ripley's is lasted about 12 minutes.
Helium is also known as the laughing gas. It is being used as anesthesia during dental surgery. If you inhale it, your voice will be cartoon-like (like Mickey Mouse).
It is also used in filling air balloons. I tried it many times that my nieces and nephews can't stop laughing hearing my animated voice.
The laughter of hyena is just a mimicry of human laughter. It's their natural sound.
"Belly laughter saved my life", says Norman Cousinns of USA, a patient having a sleeping problem due to his accident. Doctors required him to laugh for 10 minutes to have at least two hours of pain-free sleep.
Juan Mann of London shares his laughter by giving free hugs to every person he meets on the streets of the city. Free Hugs program by Mr. Mann reached the Philippines in July 2007.
