Nolan Batman Movies are great but there is always a few scenes in any movie when
you have to just ignore common sense. Like this one- why would Batman spend a ton of time preparing a bat signal in a flammable substance on a side of a building and one that was way up there.
You have to laugh at what it would have taken to make it happen. Is he like a window washer spending a few hours trying to make sure the symbol looks right? Then he’s got to run that liquid down the building and wait to see where everything is going to happen and have the liquid in a continuous line run out where bad guys a killing the good guys. Or I guess he guessed where that would happen. Of course Batman has to hope no one destroys his liquid line. Say like a truck driving over it.
Yes I’m diving way too deep into a fictional movie about a guy who fights bad guys in a costume.