My step dad always wheels out this story about how I asked him…
a) If I fired a gun and there was nothing in the way would it go all the way round the world and hit me in the back of the head
b) If I was on a boat and jumped really really high would I land further back on the boat from where I jumped
…the point of the wheeling out being “don’t kids say stupid things” but I still contend these are good questions and he is just still ashamed that he couldn’t answer them.