[GaryVoshol]

A right cylinder is one where the walls meet the top and bottom at right angles. Think roll of paper towels sitting upright on the kitchen counter.

If the walls of the cylinder are not at 90* to the base of the cylinder, it is not a right cylinder. And the top and bottom would be elipses rather than circles.

The cylinder remains aligned in relation to the robot. If the robot tips over, the invisible cylinder tips over too, so it is laying on its side. This is different than what happened in previous games. For instance in Rack-n-Roll, if you tipped over while you were extending to put a ringer on the top spider leg, you probably violated the size constraints.

The robot does not have to be centered in the cylinder, it just has to fit into it at all times.