People are Awesome
There is so much evidence out there that if a person puts their mind to it, they can literally achieve anything. I came across this video not long ago where a man had finely tuned his card control skills so he could shuffle a deck exactly how he wanted and at the same time could remember the exact order of the deck. He must have practised long hours for years to be able to do this.
And if a guys can do something as obscure as that, you have to think that if you practice enough anything is possible.