ORIGINAL: MinnFlyer
That really has nothing to do with it being a Cub, the guy took off before he had sufficient flying speed. A trainer would have done the same thing in that situation.
Flying my LT-40 I routinely start my takeoff roll with ½ throttle and full up elevator. It'll roll, rotate then it's in the air. Applying more throttle and easing off the stick keeps it from stalling out but I have a torquey .46 with 11x5 prop. I'm sure less forgiving aircraft could snap suddenly doing that but it's fun with the Kadet.