VIDEO: Harper squats while standing on exercise ball

What many consider impossible is only second nature to Bryce Harper.

The Washington Nationals outfielder gave everyone that much more reason to believe he might not be human on Friday when he posted a video to Instagram of him performing squats while balancing on an exercise ball.

It won't be Harper's only balancing act this week. The 23-year-old will have to balance friendship and competition when he takes take on former teammate Jordan Zimmermann on Saturday in the ace's first spring start for the Detroit TIgers.