Peanuts by Charles Schulz for October 17, 1974
Transcript:
Sally sits at her desk in school and says, "A centimeter?"<BR><BR> Sally raises her hand and says, "If any centimeters come crawling into this room, I'll step on 'em!"<BR><BR> Sally laughs hysterically.<BR><BR> Sally sits back and says, "Yes, ma'am."<BR><BR>
This was one of three “Sally laughing at her own jokes” strips adapted into an episode of “The Charlie Brown and Snoopy Show”.