[Alan Anderson]

For anyone still confused about the description "mushroom bot", it refers to a robot that's designed to have a drivebase smaller than the maximum legal size but have parts above the base extending out to the maximum allowed dimensions. It was a phrase used the first year bumpers were mandatory, as an example of something that didn't obey the rules. The primary intent of the bumpers is to have only bumper-to-bumper contact between robots.