VIDEO: How did this man make a snake slither out of his nostril?

This Chinese snake charmer stuffs a snake into his mouth and then somehow pulls it out of his nostrils.

In the description of the video, the snake charmer is identified as a Liu Yuanfei, and is said to have been living with snakes for over 30 years. 

But we still want to know: Why would anyone do such a thing?

And also - how does one learn to do such a trick?

Watch and squirm for yourself. 

Source: YouTube