it's simple... stop taking risks and get training... understand the performance and proper use of the machine you are in control of BEFORE you use it, and learn about weight displacement especially important if carrying a passenger or heavy/bulky stuff on the rear rack... this is a classic example of not knowing proper operation of the vehicle, the terrain its capable of, and what to do in case of an emergency... just to even think of putting your leg down like on a motorcycle to steady yourself is insane and he's paid the price for it... first of all ride the vehicle within your own limits of experience, after that, stay within the limits of the vehicle and suitability for the conditions, and terrain, and things should be fine... the fact he unexpectedly got the front wheels in the air is proof of inexperience... he's lucky it didn't come back on him and inflict even worse injuries, or even death.