Sandra has brought an assortment of shoes to the laboratory to see which ones maximize her comfort and control of the pedals of the laboratory pumps. She begins by working each of the pedals barefoot, then moves on to a pair of flat-heeled thong sandals, then some flat gladiator sandals, then some (rare) high-heeled thong sandals, and finally, some slightly more conventional, yet super-sexy, high-heeled sandals. Which will she prefer? There's only one way to find out!