Yeah Tacxted, that scene cracked me up. I was disappointed though, I was looking forward to an epic fight scene.
On 24, there are examples of good guys (usually related to Jack) using guns, although they are usually getting them from the bad guys.
Skyfall has James Bond team up with an old civilian, using local weaponry. Jason Bourne used a double-barrel rifle in the first movie. While these are special agents, they are using weapons obtained from local families.
Stop or My Mom Will Shoot (terrible movie; but I love it) has the little old lady shooting a giant revolver at the bad guy.
Men In Black has the farmer and the tow truck driver both armed, although that seemed kind of futile.
In the movie Shooter, the extended scenes, they explain that they're buying rifles so that Mark Wallberg can take Michael Pena and "lern him sum huntin." So they're pretending to be normal gun owners.
In the last Rambo, the missionaries pick up guns at the end of the fight, which is very symbolic because at the beginning of the movie they were telling him "it is NEVER right to take a life."
Multiple FPS video games (such as Half Life and Prey) have you playing the part of a civilian that picks up guns as you go about fighting off aliens.