(Strip Number 700, Original Publication Date, 7 September 1984)
Panel 1: As our story continues, we find ourselves watching Phil give Mike his lesson; as he does so, we see that he's chewing gum in order to combat his cravings.
Panel 2: Since he's a bit of an idiot, Phil unthinkingly blows a bubble.
Panel 3: He then brainlessly pops the bubble which results in his mustache being covered in gum.
Panel 4: Michael tells a shocked Elly "Uncle Phil's gonna be late for coffee, mom. He's still pulling gum out of his mustache."
Summary: If we don't get a Lynnsight about how awful mustaches are, we might be looking at a case of res ipsa loquitur. (Well, either that or her saying that chewing gum is counterrevolutionary.)