Alina 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 high-heeled pumps, a pair of high-heeled toe-loop sandals, a pair of low wedge-heeled thong sandals, and a pair of very simple flat sandals. Finally, she takes a "victory lap" with her favorite - bare feet - but of course, that's not really an option!