this is so weird .. love your processing & the guy running with that excellent blur ... he looks like he's in a backstreet which gives it an interesting feel .. without the mask it would've been a brilliant photograph, with the mask its a brilliant photograph with a touch of madness ... EXCELLENT .. !! :)
oh man, this shot is fantastic!! where is the face?? if you only look at the head first, feels like you're looking at some invisible guy and only the hat is seen. i just LOVE this.
edit: just read the new comments, is this a gas mask? looked to me like a motion blurred baseball cap before. now the mystery of this shot is gone a bit for me, i liked it when i thought i couldn't see the face because of motion :(