Just like Floyd Mayweather clocking what's-his-face in his last match where he clocked the guy trying to hug him.
Legal? Yes. Questionable means of winning? Yes. If Floyd wanted to prove he was the best, why not straight up fight him instead of taking what was a cheap (but legal) shot?
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TheRock ~ Slow dramatic zoom-pan. Doesn't phase the hooded man.
"You have issues." - MWC. Pot. Kettle.