In southwest China’s Sichuan Province, you can find this man putting on a dangerous street performance. He performs on the streets of Mianzhu, a city heavily damaged in the 2008 Sichuan Earthquake.
He claims the techniques come from kung fu and qigong that he learned while at the Shaolin Temple. It’s taken him 5 years to master these skills.
This is not something he recommends imitating.
If his practice serves him right, he doesn’t feel any figment of pain. It’s practically a tickle. This is the hard qi gong style practiced in China. It can make someone impervious to pain and unharmed when struck.
One day he may have taken a chance and raised a drill to his head, hoping his abilities had developed to that point, closed his eyes, and drilled. Or maybe he started with a flimsy drill bit and worked his way up in metal hardness. Whatever way he developed this skill, he’s alive today, so something must have worked out along the way. But I doubt this is normal training of monks.
This all assumes he has a brain in there. If it’s hollow and thin, or devoid of matter, then he’s got nothing to worry about. In that case, drill away!
But I really doubt that Shaolin Buddhist monks would teach him this for the purpose of traveling the roads and performing for money. There must be a deeper purpose of such techniques. Like developing discipline and control over one’s body. How could it be for the purpose of entertainment alone?