Continuity mistake: While Mr. Klimer is forcing Debbie into the car, he for some reason seems to have a Charlie Chaplin-esque moustache which he doesn't have in any other point in the episode.
The Oblongs (2001)
1 continuity mistake in Disfigured Debbie - chronological order
Starring: Will Ferrell, Pamela Adlon, Jean Smart, Randy Sklar
Revealing mistake: When Mr. Klimer is chasing Debbie while she says "It smells like poor people", her face is back to normal instead of disfigured.
Helga: Don't shoot or I'll kiss him again.
Milo Oblong: She's not bluffing! She'll do it! Her lips are like shark skin.