You can absolutely never judge a book by its cover, which couldn't be more evident than in this video where an old man steps into the ring to spar with a young gentleman who doesn't appear to be taking it very seriously... at first. 

It becomes pretty evident that this older fellow knows exactly what he's doing, showing beautiful head movement before dropping some bombs on his unsuspecting partner. 

To be fair, the younger guy cannot have been expecting this, but we feel sorry for anyone who tries to mug this chap.