Clip #16 (which “fills in the blanks” of episode 20--their "Horror High" special--of The Midnight Horror Show) was played on episode 24.
Summery: In this clip class begins with brain-farts on The Craft, Christine, Freddy vs. Jason, Freddy's Dead, Nightmare 1, The Faculty, Final Destination, and It; the boys ponder Romero’s zombies, and Lucas wonders if a human cannibal is still a cannibal when he turns into a zombie. (NOTE: This clip was accidently replayed in episode 25 of TMHS.)