So I love how you can do this, but I have a question. 
 
I only shot out a few on accident towards the beginning of the game, is there a lot of chances to do this where I just didn't notice?

I wouldn't say there's a lot, and maybe not enough opportunities to get you the trophy/achievement for example, but there's a fair few chances, yeah.

I think you can shoot out any windows, but I'm not totally sure. From what I've heard, it's not really a good idea.

There's only 5 in the game I believe.
 

Hmm, thats a little disappointing. I'm on Chapter 11. 
 
The trophy can be obtained on my second +playthrough though correct? meaning the trophies are accumulative ?

A better question is, why do the doors always wait to close until you start to get sucked through them?

" Hmm, thats a little disappointing. I'm on Chapter 11.  The trophy can be obtained on my second +playthrough though correct? meaning the trophies are accumulative ? "

" A better question is, why do the doors always wait to close until you get start to get sucked through them? "