I've been wanting to bring this up for a while now (pretty much since December) and I can't believe it wasn't asked here already (it's the
very first scene, although it's not a hardcore "plot hole" as much as a common sense/suspension of disbelief issue):
When the camera is flying across Gotham, zooming to the glass building in the opening scene...those two zip-line guys blow out the window to shoot their line across to the bank's rooftop, right?
How does all that glass and debris fall 6-10 stories (they were at least that high up) and a) not kill anyone below, or, at the very least, b) cause
everyone to look up and wonder "WTF?!", especially when they seen two guys flying across on the zip-line. Wouldn't a ton of emergency calls go out to the police and EMTs, right then and there?

t:
I guess we could say that those police cars showing up after Joker pulls the school bus into the street were from the calls placed then (assuming one of the tellers or the bank manager didn't hit the silent alarm...I can't remember).
But it just seems odd that if you're trying to do a major daylight bank robbery, you don't want to call attention to yourself beforehand.
Blowing out a window on a busy downtown street from several stories up pretty much seems like the last thing you'd want to do...
Yeah, I know it makes for a better, more exciting shot/intro (versus them gently and methodically removing the pane and placing it inside the room like a sensible person would do), but still...