Knowing that Ivy has a deadly weapon that is dispersed in the air Captain Gordon instructs the SWAT unit to issue everyone gas masks. Yet when they arrive at the Wayne Foundation benefit none of them are wearing gas masks. He also orders them to use non-lethal rubber bullets, yet a close-up of Bruce Wayne Dressed as one of the henchmen's Kevlar vests shows a normal copper jacketed bullet, fired by Gordon, stuck in it.