But I know it was just an optical illusion caused by moonlight and atmosphere.

Know It All (Eddie Deezen)

4 seconds sound clip from the The Polar Express movie soundboard.

You can hear this line at 00:44:35 in the Blu-ray version of the movie.

Quote context

[...]

- You are just like me, my friend. A scrooge! Ebenezer Scrooge.

- North Pole, Santa Claus, this train it's all a bunch of humbug. A bout of indigestion.

- Oh, yeah. I know what you are. You're a doubter. A doubter. You don't believe! You're a doubter! You don't believe!

- Hey, you missed it. We rode down some really sharp hills.

- And then we were on what looked like a frozen lake.

- But I know it was just an optical illusion caused by moonlight and atmosphere.

- He said the train was actually on the ice. But I said that's impossible You can't put a train track...

- Hey, where you going now?

- I'm wishing on a star and trying to believe that even though it's far, he'll find me Christmas Eve.

- I guess that Santa's busy 'cause he's never come around. I think of him when Christmas comes to town.

[...]