I was presented with my best opportunity, this bow season, to harvest a deeryesterday evening. Walked into the woods behind my house with 30 minutes of daylight left in the day. Just happen to walk up upon a few deer walking thru a thicket on the other side of the creek. Drew my crossbow on a body of a deer, and had it in my crosshairsfrom about 20 yards. For some reason I hesitated, and begun to think of all kinds of other things, instead of pulling the trigger.I don't know if this occured because I was unable to see the head of the deer. Within 20 seconds the deer slowly moved behind a tree, with all the other deer,and my opportunity was gone just like the daylight. I'm kicking myself today for not taking the shot.