The acts of some foolish people who break rocks on their chests, sleep on pins and sharp objects, bend steel with their eyelids, pull cars with their hair or teeth, swallow blades, chew glass and many other super acts all fall under charlatanry and sorcery. These are similar to the acts done by the sorcerers of
Fir`aun (Pharaoh) as Allah (Glorified and Exalted be He) says in Surah Al-A`raf,
So when they threw, they bewitched the eyes of the people, and struck terror into them, and they displayed a great magic.
(Part No. 26; Page No. 270) Allah (Glorified be He) also says in Surah TaHa,
Then behold! their ropes and their sticks, by their magic, appeared to him as though they moved fast.
Based on that, it is not permissible to do these things, learn them, spread them, or encourage others to do them. Muslims should fight such acts and report those who do them to the authorities to punish them and to protect people from their evils. Moreover, these acts involve charlatanry, sorcery, manipulating people, spoiling the creed and devouring people's money unjustly.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.