Surprising Nobody, I Am Easily Amused
In the Chuck Jones Looney Tunes classic Robin Hood Daffy, there's a scene right at the beginning where Daffy--whilst strumming a lute, the cornerstone for a good comedic routine--trips over his own feet and falls off a cliff into a lake. Then, as he's climbing out, the shot switches to Porky Pig, laughing hysterically.
Then he stops, and a single tear rolls down his cheek. And then he's right back to laughing.
That is exactly what happened when I saw this panel from 1965's Adventure Comics #330:
Ha-ha, very funny. Ho-ho, it is to laugh.