[Alan Anderson]

Before the height restriction was lifted, one of my ideas for removing a trackball from the overpass on the opposing alliance's side of the field was variation on this idea. Use a wheel at the maximum 6 feet height. It will contact the bottom of the trackball. Spin the trackball in place -- as it is being lifted slightly, it will not stick on the overpass rails. Once the trackball is spinning as quickly as you can get it to go, suddenly stop, or even reverse, the wheel. Bam! The trackball jumps off the overpass in the direction it's spinning.

We prototyped this. It works. But other schemes that reach higher can work quicker.