i don't think its a fake. look at the detail of the guys reflection in the wet road, it doesnt look super imposed to me. looks a bit stop starty but thats likely from the fact that its a security camera. who knows, if it is a fake its pretty damn impressive, if its authentic its quite awesome.
Seriously though, I think if he was really aware - he would have stopped and walked back on the side-walk - a more fitting .gif would be someone throwing their TV out of the window or a seeing a police officer take a hallucinogen for the first time.
'..you dont want to see somebody disappear into chaos, you dont want to see somebody scratching and clawing there way towards death..'
I doubt it is a fake and if it is then a hell of a job was put into the dude's reflection.
I wasn't sure what the gif was suppose to mean in relation to the song at first because it took some time for it to load and for a good 25 seconds I was only looking at an empty crosswalk.
the dude literally moves to the side by, like, a foot at the end of the GIF (as the bus reaches the picture frame). otherwise it looks really authentic!