For those who doubt that Gregg Popovich has a sense of humor

I don’t know anything about the context of this short video. I’m completely clueless as to the circumstances of Spurs coach Gregg Popovich’s evening run, or why he seems to enjoying himself so much during it.
Some react to Pop’s cranky persona while being interviewed, but it’s certainly not the only side to him.
Gregg Popovich is coming for you pic.twitter.com/IYjeoXIXDt
— Ananth Pandian (@Ananth_Pandian) April 21, 2017
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Source: Pounding The Rock