It's well known that laughter makes organs in every part of the body from the heart, lungs, muscle, brain, until the immune system work well. When smile or laugh. The body produce the hormones "Happy" or named "Endorphins" which can help fight with fear, stress it also help the body systems are relax and balance the hormones in the body. Humor can make you have a positive thinking, can struggle through difficult situation even disappointment or loss. In a word, just laugh or simply a smile can making you feel better. So, to sum it up, laughter is powerful and free medicine for body and mind.