You Might See Crazy People Doing Backflips in Philly Tomorrow

Tomorrow, expect to see a bunch of people running up walls and over benches and every other obstacle they can find as they participate in the Philadelphia National Jam 2012—a parkour event that starts at Penn’s Landing and will move along Market Street. For those not in the know, parkour is basically the art of moving from one point to another quickly and efficiently. More recently, though, parkour and freerunning have become a bit of a subcultural phenomenon that has spurred countless YouTube videos of people doing backflips off walls, climbing up parking structures, and utilizing everyday objects to entertain people who are bored in their offices.