That kid played
no games with that first dude. I mean, he didn't 'go all out', but he made sure that every punch that he landed had a lesson attached to it.
The story is always the same with those guys that you mention. Athletes who think that their athletic prowess makes them super human.
Then they start eating body shots, get dropped, and be wondering like bu-bu-but I got rock solid abs from football
That clip isn't the actual full length version, either. The full length shows the fight being stopped right there at the very end when the guy doubled over for like the 3rd time or so.
The coach called it quits, snatched the gloves and helmet of the fella, and talked pure shyt to him about how disrespectful it was for him to walk into that boxing gym and challenge them, ending with him telling him not to ever step foot in that gym again. Wish I could find it.