Look closely -- that's not two dudes walking side-by-side -- it's one dude being stalked by his own shadow. What you're seeing is a Bristol, England, art installation that records a random pedestrian's movements from hidden streetlight cameras and then projects the recording on the ground by the next passerby. The result looks like someone trying to beat a high score in Mario Kart, only instead of the spirit of friendly competition, they're racing against an actual spirit who presumably has no interest in friendship and is concerned only with the competition between God and the Devil to capture the most terrestrial souls before the sun burns out and the Earth explodes. These mobile Peter Pan tributes are specifically installed in minimally traveled side streets, just to make sure that anyone who experiences a ghost shadow is utterly alone when they become paralyzed with panicked confusion.
"Lights! Camera! Shit your pants!"