Hard to tell, but for having someone stand directly in their way and trying to detain them while they're working so frantically, the two guys on the sides of the gurney aren't paying this whacko a bit of attention--their eyes are focused upstream of where they're heading. Ditto for the rest of the gurney carriers.
The lighting and shadows (right hand, helmet) make him part of the real picture.
Relative sizes are also wrong. Look at GHG's hand 'on' the shoulder/arm of the guy on the viewer's right. The hand is way too big compared to the size of the shoulder.