Peanuts by Charles Schulz for March 19, 1977
Transcript:
Charlie Brown stands and shouts, "All right, Milo, let's see your slide!"<BR><BR> Milo stands on the base and asks, "Is it okay to slide head first?"<BR><BR> Charlie Brown replies, "Sure! Sometimes a head-first slide is the best kind . . ."<BR><BR> Milo stands on his head and slides on his head. Charlie Brown says, "That needs a little work, Milo!"<BR><BR>
That slide is called a “reverse pigpen”.