Krazy Kat Met the Public on this Date
On this date, June 20, in 1910 "Krazy Kat" comic strip by George Herriman debuted in NY Journal.
The best I can tell, many times the rat hit the poor Kat in the back of the head with a brick. I guess in early days of comics the punch line was kept simple. Apparently a sharp pain in the back of the head must have been hilarious, providing it was happening to someone else