Mama Gass is a retired Turbobese (Rename) racer.
Career-Ending Crash
Gass was necks and necks to win the continental title when a highly pressurized release of flatulence caused her Baricycle to burst into flames. Interestingly, it was not ignition of the fumes, but a pressure fracture of the vehicle's battery lining from the force of the ejection. Gass survived to tell the tale, and now operates the circuit's gas station.
Also
no arms or legs