From Neg's Urban Sports, here's Urban Sprinting:
you find a shop with a security guard - you take your tag and set off the alarm - you aint nicked nothing but theyll still chase ya - when you get to the nearest burger bar, the clock stops. And thats how you play urban sprinting!
Of course, in the States, they'll just tazer you. Hit play or go to Link [YouTube] - via reddit
I think you've all been had.
Frankly, if it is real, I didn't find it amusing. Pranks like this could put a lot of bystanders in danger, getting out of the way, and such. I once got caught in the middle of a real-life shopping mall chase, stuck between the guards and the perp, and it was not much to laugh at.