No, really.
Two skinny guys with waist-length beards, and their curly-headed friend. They always wear sunglasses, jeans and boots. And bright orange vests, in a nod to not-getting-run-over.
So far I've only seen them stand there and direct traffic. No choreographed pointing down the road. Though I don't ride a motorcycle and my legs are not, quite, video-worthy. So perhaps they do it when I'm not around. I'll have to ask Willem.