I had the pleasure of walking a couple of days with two English gentlemen who shared my sense of humor and then some. We arrived in Sahagun during festivities (including running of bulls, of which there were exactly five, somewhat Pythonesque in itself) and decided to dive in the celebrations and have some beers.
While having a drink, one of my friends noticed a group of girls dancing in a bar to a music video, all of them imitating the choreography on the tv. He joined them immediately, quickly being accepted and cheered on. He wasn't half bad, either.
I watched, very much amused, and turned to my other friend: "Does he do that often?" He looked up from his phone, located his buddy, watched for a few seconds, didn't even blink and remarked: "Well, it is his favorite dance..." and turned to his phone again.