I tried to re-chocolate chip cookie my crossbow from the stand before, but it was a dangerous thing to change and shift my weight while that high up.
I then came home and bought crank-cocking devices for both my crossbows. It's easy and quiet to use a crank cocking device, and doesn't make as much movement on the stand.
If you are re-cocking because you missed the deer, and the deer is still there, it would be tough to re-chocolate chip cookie the crossbow by hand and not get busted by your movement.
But a crank cocking device requires much less movement to use, and you can generally hide that movement since it's just one hand turning the handle.