Yes, such things become possible, there is no doubt about it. The way that the average person functions is just scratching the surface of the potentialities of a human being. But even this has it’s limits. Try as one may, one is never going to grow a third head - even if one awakens capabilities which may appear to be super-human. If one has become identified with the ego one is naturally going to think that man can have absolute control over nature - that is part of one’s ego trip. And to have absolute control is impossible, because control itself means boundaries, it means limitations.
Yoga is very clear that all of prakriti comes under one control. We can control prakriti, because we are outside of prakriti watching her dance
She obeys us. She is only there for us says Patanjali 
It should be understood that control, in the very nature of things, means restriction.
Yep restriction of of prakriti. Not of us, we are free.
Everything in nature is such, that it is impossible for anything to function as a separate entity, everything is interconnected in a complex web of cause and effect. It is for this reason too - that it is impossible for man to have absolute control.
All of prakriti is connected in a web of complex cause and effect. This is why I use the word mind-body system and mind-body continuum. This is all just a web of cause and effect caused by the gunas . However, we are outside of prakriti and causality. We are free beings. We can make prakriti dance to our tunes 
That is nice that he has learned how to perform that trick, which any fool can perform with enough training. Like this, there are many people who can perform all kinds of feats, both physical and mental. Some people can walk on a tight rope for hours upon hours. Amongst several shao-lin monks, they are capable of being attacked by swords without penetration of the skin. Some yogis can swallow razor blades without damaging of the internal organs, others can remain buried alive for days, weeks, months, or years. Another well known yogi had managed to remain underwater for several days at a stretch, and it was a public display of demonstration of such an ability.
Can you do any tricks? Care to be submitted to independent trials where we will bury you for 7 days 
But these do not mean anything at all as far as one’s insight and spiritual expansion is concerned, they are just superficial.
Right, but that was not the point. The point was to show the powers of our consciousness over the mind-matter continuum(prakriti). Not only can we control her, we can make her dance to our tunes. The more refined your consciousness the more powers you have over her. Those yogis who can be buried for months, days and years can do so because they have power over their body. Prahlad Jani has powers over prana. He claims he can extract the prana from any source from the sun, rocks to air.
We are getting clogged with SY only 