Quit scanning! OK, I’m not serious about quitting—I just wanted to get your attention, and to think about when and where looking for another threat is a good idea.
As best I can determine, scanning grew out of an FBI report that 67% of the time there was more than one opponent. The FBI is good at studies, but the last, maybe the only, FBI gunfighter was Walter Walsh—and he chased John Dillinger.
I’m as guilty as the next guy when it comes to emphasizing scanning. In a gun kata I developed, the shooter shoots, then scans left, right and rear in a choreographed series of movements.