Tattoo Festival at Wat Bang Phra

'Every March, the Wat Bang Phra buddhist temple of Nakhom Pathom, Thailand, becomes the scene of a celebration, known as the Wat Bang Phra Tattoo Festival.'

'Wat Bang Phra buddhist monastery is famous for its magically charged tattoos and amulets which can protect its wearer against harm and even speeding bullets.'

'Some of the devotees, in a deep trance had been taken over by the animals tattooed onto their bodies. Sometimes a monkey. Sometimes a tiger.

If they were a tiger they would roar and clench their fingers like claws. If they were a snake they would crawl on the ground.'

Some were calmed by their friends who stroked their head or rubbed their ears.

'And how about protection from being physically harmed?

The people who have that tattoo (ลงยันต์ สัก ), will be protected. But they must be moral, and follow the five precepts. (Do not kill. Do not steal. Do not be unfaithful to your spouse. Do not lie. Do not take drugs.)'

source:
here, here, here, here, here and here