FlintlockJazz: If you watch that scene when it shows Alice firing the gun from behind you see that see's actually winding it up like a jack in the box in order to fire it. :D
Miaghstir: I was more thinking about the automatic fire, I'm sure it'll feel great in-game though. It just seemed "odd".
Aye, I do know what you mean, hopefully it'll have very little ammo so that you can barely use it or you get it late in the game, otherwise it might outshine the knife (can't have that!!!).
On a side note, another gameplay trailer, dunno if everyone already knew about it or not but it seems to show more what the game will actually play as since it's just someone playing an early build by the looks of things.
http://www.youtube.com/watch?v=X7NIZ18nq2c&feature=related Towards the end you get to see a fight, including the use of the machinegun thing. Alice seems to switch between the weapons rather quickly and often.
EDIT: Edited because I put the wrong link in like a complete muppet.