Circus balancing act

Really impressive balancing act at Zippo's Circus. It must be the case that the line of action of her weight down from her centre of gravity must act through her base area or else there would be a resultant torque and she would topple. Hands give a bigger area so she balanced on top of a pole which would make it harder. She then raised herself by catching and adding bricks under each hand, one at a time.