You feel lighter, but your weight doesn't actually change! Your body experiences less normal force – it feels like you're floating, but no kilos disappear (unfortunately).

Yes, it can actually become superheated if it's completely pure and has no spots where bubbles can form. It just sits there, primed and ready to boil – like coffee that never got its caffeine.

They land at exactly the same time. Weight has nothing to do with falling speed in a vacuum – even if the slice of bread feels a bit less sturdy about it.

You roll backward! Momentum has to be conserved, so when the ball goes one way, you have to go the other. Science's version of karma.