(Strip Number 1405, Original Publication Number, 13 January 1988)
Panel 1: Having noticed the glob of clay on Lizzie's sweater, Elly asks her what that is and is told what it is.
Panel 2: She gets Elly all worried when she says that they had to make clay pots in art class today.
Panel 3: When Lizzie asks Elly if she can make a pot, John says that of course she can.
Panel 4: When he says that it always vanishes when she stands up, Elly is pissed.
Summary: What we have here is Lynn needing to hate her physical appearance so much, even a thing about her lousy posture is a killing blow.