Dave Matthews is one of the biggest musicians in the world. His band reportedly costs about a million bucks a night to play a concert. That doesn't mean he doesn't have a good sense of humor.

Here we have a video with Dave and a guy by the name of Brian Calhoun who builds guitars for Rockbridge, slapping the hell out of each other while playing guitar, going canoeing and swinging light sabers. Sounds like fun, right?

Could they be fans of How I Met Your Mother? One of the most famous episodes from the show, all the way back in season 2 is called, "Slap Bet". Read up on that and see for yourself below if there is any correlation.

Let's hope we see some more local DMB shows in summer of 2015. Bethel Woods and SPAC, please?