There aren’t many ways to make traffic jams productive. You can make phone calls, listen to audio books, or practice your calming breathing exercises. But none of them help you escape the reality of being trapped in a metal box, surrounded by thousands of other metal boxes, all performing a dance forwards, slowly, foot by foot, across the asphalt. A Saudi Arabian inventor, Nasser Al Shawaf, decided he wanted the ability to do something useful with his hours in the car every day: exercise.

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