The concentration level required to fly RC planes is much higher than learning a lot of other things because of how fast things can go wrong. Lets face it, if you turn the wrong direction at the wrong time and don't correct it within a few seconds, it may be too late to save your plane!! If you do this, your instructor has to react twice as fast to get things under control again. If you don't need a break after 10 minutes, theres at least a good chance that your instructor will neeed one!! Onr other thing, always break a large brim hat with you. You don't want to be losing sight of your plane from the glare of the sun.[8D]