Aside from all the well made points about the aerodynamic, power, and control aspects of being this reckless in a helicopter when you don't need to be, there is another obvious reason why this genius is well on his way to killing himself or others. A very superficial glance at any accident database will reveal plenty of instances containing the words: "while performing the manoeuvres in front of friends/relatives, the accident pilot...". It is a well documented and established fact that when spontaneously showing off your superior airmanship skills to others, your chances of being the first to arrive at the smoking hole are increased exponentially. The howling Jackasses on the nearby vehicles tell you everything you need to know about this pilot's preparedness, risk awareness, and professionalism.