A child? That's enough to break a stream of curses. A minute later there's finally light and Feanor sees a kid's head poking through a hole between bags. When the biggest obstacles are removed he's able to crawl out.

"I'm fine."

Which is surprisingly true. He's been lucky, some of those bags are really heavy.

"Thank you."

The fact that no harm has been done doesn't mean he's going to let the author of this architectural disaster of the hook completely.

"I didn't occur to you that building something so unstable in a moving train could be dangerous?"

Look, he's not mad that you built it, kid. He just disapproves how you did it.