True knife vs. gun story
(Secondhand, but from my CWL instructor, a trusted source.)
My CWL instructor had a student take the CC course, but the fellow was too young to legally own a handgun. (I guess he just wanted the training, and had the extra money to get it.) However, the guy always carried a knife, and knew how to use it.
One day he was walking in a less than ideal neighborhood (not sure why, as I don't know him personally) he saw 3 guys approaching him from in front. While still very far away, 2 of them veered off, apparently departing the area. As the remaining guy got closer, the good guy noticed his eyes were shifting left and right, putting GG on alert. He turned and saw that the other 2 had circled around and were now approaching from the rear. He had his hand on his knife, blade ready. Right about then BG#1 was upon him, pulling a Glock from a cross-draw position. The GG didn't hesitate - he grabbed the gun hand, and with the other drew the knife as hard as possible across the inner wrist, apparently slashing all the way to bone. Blood spewed everywhere, and the pistol hit the ground. He immediately picked it up and spun around to face his other 2 attackers, only to find they were GONE!
A witness had called 911, and apparently police were on the scene within 60 seconds (station right down the street.) Incredibly, BG#1 (shooter) clamped down on his wrist so hard that he didn't bleed out as he ran 4-5 blocks to a hospital, where he was arrested. (Of course, long criminal record, stolen gun, etc.) The police were amazed that he survived such a severe wound.
So, with alertness and Lady Luck playing a big part, this was one case where a knife beat a gun. Had the GG not been skilled with a knife, and alert, or the other BG's been armed and/or not wussies, the outcome would've been different.
In any case, NOT a situation in which I'd like to find myself!