Transcript:

A puzzled Charlie Brown lies in bed and watches as Snoopy walks across the ledge of the bed.

He exclaims as Snoopy continues.

He puts his hand to his face and exclaims,"Hmm!" as Snoopy continues.

Snoopy stops and looks at him as he exclaims,"All right, let's break it up, and go to bed!"

This gag is recycled from the Li'l Folks strip from April 24, 1949: