Investigator Tatiana Divens alerts us to a Washington Post account (part of an obituary) of an unusual means of injury:
Paul Schaefer was born near Bonn in 1921. He had a glass eye, having accidentally gouged out his right eye while trying to untie a shoelace knot with a fork. He joined the Nazi youth movement before becoming a Luftwaffe medic stationed in France during World War II.