Ungang War: Genre Undetermined

"Hey, man, you want some--" he started to say, planning on hassling the middle aged man who'd just crossed the street. He knew the guy--thought he lived around there--but the guy wasn't a user. His jaw dropped open when the man dropped the briefcase he was carrying, revealing a hidden sawed-off shotgun. The dealer lurched for cover, but he hadn't been ready, and the sheer shock of seeing a boring middle-aged civilian with a serious weapon had made him slow. The shotgun blast cut him in half. One arm fell reaching toward the door of the building that he kept his stash in. The sound of gunfire made his gang brothers swear and tumble out of the building, looking for the rival gang sure to have started shit. They gaped at the middle-aged businessman. Then a soccer mom pulled up in her van, swinging the car wide so that the back end was pointing at them. The doors flew open, and a battalion of grim-faced mommies swung around the machine gun bolted in back--

Inspiration: It was very satisfying to write that.
Story Potential: High.
Notes: I could write 5,000 very satisfying words of that. But I need something a bit catchier to make it a good story. OTOH, I bet a lot of people would enjoy reading something like that, too.