The original style cycle helmet was invented in Holmfirth, Yorkshire, in 1932.
The local butcher’s boy was delivering orders on a bicycle with a front basket. He went over a pothole, and a pound of sausages flew into their from his basket, and landed on his head. While he was marvelling at how the dozen sausages had perfectly formed themselves into a protective shell around his cranium, he hit another pothole and fell off his bike. He was not worried, as he assumed his new sausage helmet would protect him. However, the sausages offered him no protection whatsoever, as they lacked the essential chinstrap and fell off.
The butcher’s boy suffered serious brain damage, but still managed to appear in three thousand episodes of “Last of the Summer Wine”.