October 30, 1953: We may call this the "Lucy Loophole"

I love this one.

The Lucy Loophole:
When considering how useful a specific thing is for a purpose, do not forget how useful it is as a general thing for that purpose but used in an unexpected way.

October 30, 1951: The Day Before Halloween

Like the hiding-behind-the-tree and floating-beach-ball strips before, it's another strip making fun of Charlie Brown's appearance, which only makes sense if the characters seem each other as the reader sees them, that is, as stylized cartoon characters and not flesh and blood.