Revealing mistake: When Eric tells Cory and Shawn that the hot chocolates were $4, Cory looks up at the prices and says "that's the retail price." As the scene and the rest of the episode go on, if you pay close attention to the sign that has all the prices, hot chocolate is not an item.
Boy Meets World (1993)
1 revealing mistake in You Light Up My Union - chronological order
Starring: William Daniels, Rider Strong, Ben Savage, Betsy Randle
Visible crew/equipment: When Topanga carries Cory into the room you can see a crew member's hand triggering the doors to open.
More quotes from Boy Meets World
Trivia: In this episode, Julius Carry plays Professor Michaels. In later episodes, Julius Carry plays Sergeant Moore, Angela's father.
Question: Topanga said in one episode that she has a weird middle name, did she ever say what it is?
Answer: Topanga's middle name is never specified. Considering her sister's name is Nebula Stop-the-war Lawrence, Topanga's is probably something equally unusual.