Setting: Modern day France. It's a fanfic, and the fandom is Despicable Me, if that helps.
Googled: For the first question: Recoil shoulder injury, recoil injury. I did find this: www.thehighroad.org/showthread.php, but it seems to be more focused on getting bashed by the butt of a gun, which is not what I'm looking for.
For the second question, I'm not sure what to google!
Okay, question one: This girl has a grappling hook gun. Ideally, I would want it to be a small gun, but with enough recoil that she has to use two hands (To propel the grappling hook? Would this be possible?). She is hanging from some bars outside a window and is going to use the gun to break the window, but y'know, she has to hold onto the bars with one hand, so she only uses one hand to shoot the gun. My question is: What would this do to her arm/shoulder, if anything? Would it just hurt, or sprain, or (And I'm guessing this is highly unlikely) dislocate the shoulder?
And question two is pretty much directly related to the first: The window that the bars are protecting is, for all intents and purposes, 'bulletproof'. I know that this grappling hook gun is fictional, and thus this question is probably not really answerable, but is it possible that the grappling hook gun would be able to break the window?
I'm sorry if these are obvious. I don't know anything about guns.