Finch says if the stock doesn't take a dip, short sellers will take a massive loss but it's not factually correct. The stock would have to climb significantly in order for them to take a loss. Lack of dip alone wouldn't cause them to take a loss if the stock is flat.
When the "Park Uni" police officer draws his gun, it is obviously a non-functional prop--there is no muzzle to the barrel, just a solid surface.