>>121275108I dunno man... the other guards were dead, yet the nurses were alive. Why wouldn't the guy just hallucinate everyone being dead from Joker gas if it was really fear gas? On top of that, Batman shows up at the end and confirms that there are only 17 people left alive in the whole building. And on top of THAT, the whole book was framed as Wonder Woman witnessing different events happening across the world, -she wouldn't witness some guy's drug induced hallucination.
