They say you can't teach an old dog new tricks. I think that's perfectly fine when the old dog's trick is throwing hands like this.
The boxing match starts out as you'd expect with the spry young man bouncing around, ready to obliterate this frail old geezer. Come to find out it's just the opposite. The old man catches the man-bun-sporting fighter off guard, gets him off balance fairly quickly, then connects with a wicked left.