Prostration.

In Tibetan culture, prostration is one of  common Buddhist part of practices. We start our morning pray with taking three prostration in our shrine at home. We also practice it in monastery, stupa etc where the religious are. What is prostration? There are two types of prostration; one is normal as see in the picture. Its sign of profound respect and paying homage to the Buddha, his teaching and lama/monk or to some religious places.

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Second one is performed by dropping the body forward and stretching it full length on the floor as you see below: 

We also practice it for purify defilement and accumulates merit-good karma. It has other several benefit too. Its also common for Tibetan to prostrate along the route of Kora (walking around the religious places in clockwise direction).  In most cases, the pilgrim will prostrate themselves the entire length of their body, then rise to step to the spot where their hands reached. They will then prostrate again from the spot and continue like this throughout the whole kora. This takes up a huge amount of time and enrgy, both physical and spiritual. So this is one of more extreme methods of prostrating and only the most devout do this on all koras.