“Willy Wonka and the Chocolate Factory”
I’m sure everyone can agree with me when it comes to how surprisingly creepy that tunnel scene is. It came out of nowhere, right? Turns out, the entire cast except for Gene Wilder felt the same way. In fact, they were never even introduced to Wilder until his first appearance in the movie, and they had never seen the set. That means that not only are the looks of extreme awe real, so are the looks of confusion and fear when Wilder starts singing his creepy song.