This season's White Tail buck saw me up in the tree about a second before I saw him. We were looking one another in the eye. I think there were two things that kept him from bolting. First is, he was really interested in the doe scent I had placed in the bush there, not ten minutes before. Second; I was up in a tree. Mr. buck just couldn't reconcile that strange "thing" up in a tree, and he was craning his neck at me as if to get a closer look. Yes; deer do sometimes exhibit curiosity. I’ve seen it before.
I had to un-snap the retaining strap on my holster, the sound of which visibly gets a reaction from him, then very slowly draw it and bring it up into a firing position, Mr. buck still having his eyes glued to mine. When I cocked the revolver of course it makes that "clickety click" sound. He's only sixteen yards away and so the sound is right in his face. He perks up rather frantically at the sound, then, presumably deciding it’s about time to move along. He turns sideways with one step and pauses, presenting a perfect shot, and only just begins to take another step as he gets hit (that’s why the bullet struck the “elbow” on the far side – he had his off-side leg raised in the early process of taking a step).
On three other hunting occasions I've flushed White Tails out of the brush and they bolted, only to stop and turn broadside and look back after running 50 to 85 yards, presenting a shot...BANG!. Dead deer.
Col. Jeff Cooper noted that all of the ruminating quadrupeds, on any continent, tend to do that. About 60 percent of the time, when running from an unknown, sudden "threat" they'll get out a ways, then pause, turn and look back. That has been my experience with our Northwest White Tails also, many, many times over the course of fifty+ years in the woods and fields of the Inland Northwest. For pistol hunters that doesn't help, because they'll almost certainly be out of decent pistol range at the stage, but for any rifle hunter it presents a good number of one's opportunities.