When Dr. Kelso is talking to Elliot, from the view through the glass her hair is tucked behind her ear and in the next shot her hair is down.
In obtaining a radial arterial blood gas, the puncture is made on the under side of the wrist over the radial artery (where you can feel your pulse). This is done with a syringe, not a plain needle, and not in the side of the wrist as Josh does.
When Josh is given the gloves, he makes it look like he is putting the gloves on except he just balled them up in his hand,
When Josh stops walking to write something down, he explains that he can't walk and write or he gets "nauseous." Any intern would know that the correct word is "nauseated".