[88BlueTSiQuest]

I had a friend that had attending some gun class, in which one of the workshops was very similar to this.

The instructor made a bet with everyone in the class that he could 'defeat' any one of them with a knife, before they could even get a shot off. It simply showed that if you were standing still aiming a gun at a moving/dodging target, you wouldn't have the time to aim and make a shot before the target was on top of you.

It's pretty unbelievable to hear, but if you actually see and participate in this experiment, it becomes pretty apparent that it is true. 1.5 seconds against a moving target that is moving in an erratic pattern towards you doesn't leave any room for changing aim and acquiring a new target.