Max watched the first Harry Potter movie during the flight. Afterwards I asked him what it was about:

"It's about a kid, who can't turn into a lizard yet, but he's in lizard school. And he used magic on a teacher who was mean to him and then the teacher turned to ash, but then he turned into an ash GHOST and went through the kid and the kid fell down."

Then, thoughtfully: "but Mom, what do ash ghosts usually do?"