My brother emailed this video to me of a convenience store owner in Turkey who shoots a knife wielding attacker. This video is somewhat graphic, as the attacker slashes a man's throat and repeatedly slashes at two other men. ***Warning: NSFW -- Graphic***
The store owner takes his sweet time getting his pistol into play, but when he does he makes a fatal (I think) single shot on a moving target after being stabbed and hacked. Pretty impressive. I think that keeping your sidearm in condition one on your person at all times is the way to go.