This is a nice article about the gestures that we should avoid when we are in particular country or in particular culture.Its because the same gesture has different meaning in different place. Original article at cracked.com
Link-Here

clipped from www.cracked.com 7 Innocent Gestures That Can Get You Killed Overseas Extend Your Hand, Palm Outward in Greece Give the Thumbs-Up In The Middle East Finish Your Meal In Thailand / The Philippines / China Say "Hi" to a Member of the Opposite Sex in Saudi Arabia Give an Even Number of Flowers in Russia Give a Gift With Your Left Hand, Pretty Much Anywhere Give the "OK" Sign in Brazil