Critical Hits example from World War I I

'Operations resumed on 11 April. An attack was scheduled to win back the lost sections of the main road. The attack failed, however. The next morning three tigers moved forward to halt probing Soviet forces. Commanding the lead tank was Sergeant Major Sanderring, one of the “old hands” of the Panzer arm. This attack provided a demonstration of the damage a lucky hit from a Russian anti-tank rifle could inflict on a Tiger tank. A well-concealed Soviet soldier took aim at the tank of the sergeant major as the Tigers approached. He fired his antitank rifle from a range of fifty meters. The round penetrated of one of the copula vision slits. Sergeant Major Sanderring was killed instantly. A single Soviet soldier had accomplished what several T-34s were often unable to do: put a Tiger out of action.'

Frank Kurowski,
Panzer Aces