John Riggs’ Stupid Human Trick [VIDEO]
Can you do this?
This wasn't even my best one, but you get the point. I can pop my knuckles without forcing them, I just simply making a stiff fist. I don't remember when I first learned I could do this, but I'm guessing it was around the same time I took piano lessons.
It serves no purpose, really, but it's something I can do. My kids think it's pretty neat.
My knees also do this whenever you squat down, but that's probably more due to my age than anything.
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