Grandma Was a Rolling Stone - S1-E7
Revealing mistake: When Eric first meets Mr. Feeny's niece, he throws a bag of mulch. When the mulch lands, you can see the fake grass move, and the fake background swings a little bit.
Boy Meets World (1993)
1 revealing mistake in Grandma Was a Rolling Stone - chronological order
Starring: William Daniels, Rider Strong, Ben Savage, Betsy Randle
A Long Walk To Pittsburgh (2) - S4-E17
Character mistake: In this episode Cory says that Topanga gave him his first kiss at age 13, but their first kiss actually happened when they were 11, in the 6th grade. (Season 1 - Episode 7 Cory's Alternative Friends).
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.