Yes, there is always a time for hope!
Do a slow 360 search, determine the most important target, plan your shot carefully. Plan for a precise one round takeout, observe the current wind patttern, place your target in the crosshairs, slowly draw a half a dozen deep breaths to refresh the brain with oxygen, let one out halfway and hold it. Smoothly squeeze the trigger and then hope someone else kills the sonofabitch before he kills you!
The next time you ever think that a man who has been your enemy for decades will suddenly become your friend, slap your self real hard and wake up!