Any old skateboarders (or fans of the Tony Hawk PlayStation game) will recognise this ‘move’ as a ‘Smith grind’, where the skater grinds their back skate truck along a rail while also sliding the edge of the deck. It’s a lot harder than it sounds – but nowhere near as hard as what this driver is attempting.
Of course, certain questions remain: How did they get up there in the first place? What are the odds that two people were filming it at the same time? And what are they going to do for their next trick?