I remember watching the documentary series on the design and making of the Boeing 777. I remember seeing this segment on how far the wings actually flexed upwards. But most of all, I remember the genius of dampening the toilet seats so they don't bang when let down. They did it because bangs and loud noises scare passengers.

If you're interested in the documentary, it's a 5 part PBS series from the 90's. You can find it on Youtube.