One Panel #201-203: Bonk Bonk on the Head!

From Hour-Man: "The Dark Horse" by Ken Fitch and Bernard Baily, Adventure Comics #50 (May 1940)

And here I thought it was just a Tintin trope, but nope, American superhero comics were full of people getting severe head trauma, including the heroes we knew and loved. Hourman doesn't know what time it is? It's time for a helmet.

From Captain Marvel: "The Slaves of Dr. Lake" by Bill Parker and C.C. Beck, Whiz Comics #5 (June 1940)

Billy Batson learns the hard way that he really shouldn't get into these kinds of scrapes as himself. Captain Marvel has a much harder head.

From The Whip: “The Kidnapping” by John B. Wentworth and Homer Fleming, Flash Comics #6 (June 1940)

Okay, okay, you're here the celebrate heroes, so lets see one DISH OUT concussions. How about fan favorite the Whip, whipping a chair in a gangster's face? WHIPCRACK!!!