The Santa Clause 3: The Escape Clause2006

[First lines]

Mrs. Clause:
All right, class, if a reindeer leaves Elfsburg flying west at 20 miles per hour, and another reindeer flies east travelling at 50 miles per hour, how many hours does it take for them to be 210 miles apart? Anyone? Anyone? [One elf raises her hand] Trish.

Trish:
How come we can't learn things we want to?

Mrs. Clause:
Like what?

Trish:
Like... Was it weird when you married Santa and had to move up to the Pole and give up your old life?

Mrs. Clause:
Weirder than you can possibly imagine. But then something so gigantic happened that it changed Santa and me forever.

Trish:
Like what?

Mrs. Clause:
...Okay.