Those are fun! I went to 4 or 5 of the Harry potter movies in concert. It’s a fun way to re-watch older movies on a projector above, while having an amazing live orchestra play through the whole movie. It’s really cool that the orchestra director can follow along with the electronic karaoke-like metrenome and keep everyone in sync with the movie the entire time.

It’s an emergency propeller, when the main engines lose power.

It’s also the reason I never sit in the emergency exit row. The reason they give you extra legroom is so passengers can use the pedals that pop up from the floor when the masks are dropped. When they ask if you’re willing and able to help on an emergency, this is actually the most common thing you’ll have to help out with.

Everytime I’ve been in a crashing airplane, I just lean back a few degrees and laugh at those poor suckers who traded for a couple inches of extra legroom and now have the responsibility of saving the rest of us.

They’re making the (possibly false) assumption that density will stay the same, so size must grow with weight.

Of course, it’s equally likely that size will remain constant. It changes or it doesn’t -> 50/50 odds. Until the point it all collapses into a black hole.

I always surround my passwords with <h1></h1> tags.