The Invention of the American Football Helmet. This very funny clip shows a man testing his American Football helmet invention - he thinks it will prevent fatalaties and injuries. He gets some men to kick him in the head and whack him on the head with a baseball bat before he runs head first in to a wall. Filmed in 1932.
WARNING: Do not try this at home. Running into walls or applying pressure to the head, including kicking and hitting it with objects, is highly dangerous, will cause injury and could be fatal, even with the use of a helmet.