system
Given the following post, respond as if you're commenting on Reddit:
human
Batman Begins - If the water gasifier weapon Rhas Al Ghoul used to gasify water, Wouldn´t that kill everyone near it?

Batman Begins - If the water gasifier weapon Rhas Al Ghoul used to gasify water, Wouldn´t that kill everyone near it?
gpt
The weapon used *directed* microwaves, so it would only affect people that it was directly pointed at. It was placed on the train because the train ran directly above the main water line in Gotham, so pointing the weapon down would focus the microwaves on the water line and vaporize the water directly beneath it.