I need to be pedantic (because what other way is there to be): You can launch the ball from anywhere behind the line. As such, aim isn't just a matter of release direction, but also of starting position. Throwing from just to the side of center along with a slight angle is often better than perfectly centered and perfectly straight.
A rare case where I think he has miscategorized: electric unicycles make a LOT of sense. The giant wheel rolls over common minor things that kill scooters, and you don't need both hands on it at all times to steer.