Trying to put a bullet in a potato eyeball through a scope with a .308 at 50 yards:
The Carlos Hathcock legend:
One of Hathcock’s most famous accomplishments was shooting an enemy sniper through the enemy’s own rifle scope, hitting him in the eye and killing him. Hathcock and John Roland Burke, his spotter, were stalking the enemy sniper in the jungle near Hill 55, the firebase from which Hathcock was operating. The sniper, known only as the ‘Cobra,’ had already killed several Marines and was believed to have been sent specifically to kill Hathcock. When Hathcock saw a flash of light (light reflecting off the enemy sniper’s scope) in the bushes, he fired at it, shooting through the scope and killing the sniper. Surveying the situation, Hathcock concluded that the only feasible way he could have put the bullet straight down the enemy’s scope and through his eye would have been if both snipers were zeroing in on each other at the same time and Hathcock fired first, which gave him only a few seconds to act. Given the flight time of rounds at long ranges, the snipers could have simultaneously killed one another. Hathcock took possession of the dead sniper’s rifle, hoping to bring it home as a “trophy” but, after he turned it in and tagged it, it was stolen from the armory. (Source)
BOOM… HEADSHOT. Nice work guys.