As a civilian, I had the opportunity several years ago to use some weapons that were modified to use compressed air (simulate recoil, etc.) to shoot at targets on a movie screen. Re-enacting things like hostage situations in an office, traffic stops gone wrong, etc.
Let me just say that using an M-16, SAW or Mossberg for any length of time (over 5 minutes) is *definitely* different than pointing and clicking with a mouse and that video games in NO WAY prepare anyone for the reality of using actual weapons.
I don't remember the actual name of this one rifle a Marine pulled out of the storage closet and was handling it like a toothpick. He handed it off to me and I just about fell face first just from the weight of it.
Nothing like having combat veterans laugh at a "dumb-ass civilian" to start your day out.