If they put them both on the right and left foot, they can keep turning more and more to the left.
I have two left shoes, (from two different pairs of shoes) One pair of Nike, and a pair of New Balance. I can only use the right shoes, because I broke my left leg and now wear a permanent walking boot to which I can't fit any shoes over. The Nike are size 11 mens, and the New Balance are size 10 mens. Just thought if anyone out there with a broken right leg needed some new shoes. 40$ for the pair or 25$ a piece.