The camera is made to only focus on the cars and floor of the station, so anything close to the camera will obviously be very blurred.

I don't know if it's just me, but it looked like the blur had wings! I would definitely say that that was a bug of some sort - what sort of bug is electric blue is another question, but it could have been odd lighting circumstances or a rare bug.

EDIT: THE GUY WATCHED IT FOR HALF AN HOUR AND DIDN'T GO OUTSIDE TO CHECK THE CAMERA LENS!?!?!

Good lord, I really hope he means that he watched a replay of the tape for half an hour...