This guy is so incredible how he demonstrates what a human is capable of!
once i saw a documentary of him and there was his breathing technique, i made it for 40 seconds or so and then i held my breath for literally 2min! never thought i was capable of this!
This is what got me interested, the fact that you can learn to be superhuman with just a few short lessons, incredible, check out the Joe Rogan link, it's long, but you'll end up watching it all anyway!
Cryptogee