Manfred von Richthofen was severely wounded in the head after attempting a HO on an enemy plane while flying his Albatross biplane. He took a glancing blow from the bullet off his skull and began blacking out. Miraculously, he was able to land his plane in a field in friendly territory. Soldiers in the area applied field dressings to slow the bleeding and he was taken quickly to a field hospital. It affected his tactics and attitude towards the war later.
It is rumored that he later altered the teachings of Oswald Boelke's Dicta to his men to include warning of the dangers of the HO.
ROX