YouTube influencer Devin SuperTramp is a man who knows how to get what he wants. And in this case, he wants to ride a 260-foot water slide down the streets of San Francisco. The video for Bear Naked Granola, with more than 600,000 views in its first few days online, is basically two-and-a-half minutes of young people screeching and squealing as they slosh down the steep track on inflatable rafts, boogie-boards, various rubber sea creatures and, in some cases, their bare bellies.(I'm sure the locals who spend a zillion dollars for their shoebox-size garden apartments were just thrilled with all the brand-fueled water tomfoolery.)Street surfing is rapidly becoming a thing. Last year, an artist turned a boulevard in Bristol, England, into a 300-foot water slide to highlight the intricacies and costs of urban planning, because, clearly, only a giant water slide could communicate those complex points.Check out a behind-the-scenes video below to see the equipment, logistics and rapid jumping reflexes required to pull off a shoot like this.