Though the Harry Potter franchise worked hard to bring the spirit of the original books to screen, some aspects inevitably had to change.

Indeed, Entertainment Weekly – as part of its Binge podcast – managed to discover a new secret from the filming of the very first entry into the franchise, Philosopher’s Stone; straight from the mouth of its director, Chris Columbus, who also helmed its sequelChamber of Secrets.

“The thing we shot on the first day of Sorcerer’s Stone was the final train sequence where Harry looks at Hogwarts and Emma, Dan [Radcliffe], and Rupert [Grint] are huddled outside of the train,” Columbus explained.