If you’ve got a bunch of pro-skateboarder friends and you’re splurging on a giant birthday party for yourself, it goes without saying that you’re going to need a half-pipe. That’s why Billy Rohan, a NYC skateboarder and Friend-of-VBS, came by VICE’s 15th anniversary party two days early bearing lumber, power tools, and an entourage of eager skater guys and girls. From there it was a hurried flurry of plywood shavings and bandsaw screechings as Billy walked us step-by-step through the building of a mini ramp that can service a couple thousand partygoers. Think of this little how-to number as the This Old Ramp edition of Epicly Later’d.