Kong Grapan Chadtri test of invincibility against sharp weapons. In truth, an Ordained Monk such as this one, is forbidden to perform such activities and shows of power, and is breaking the Buddhist Canon by doing so. However, it is commonplace practice in Thailand, where most Bhikkhus are more interested in Magick, than Enlightenment.
The test of invincibility against penetrating weapons is enacted by a Monk with a sharp knife.