The Sun and the Moon
This one is not automotive, at all. It is celestial, you might say. Here we go.
Everyone knows that from the planet earth, the moon and the sun appear to be about the same size. I mean, even though we know they're not the same size, to the casual observer from our vantage point, they're about the same size when we look at them up in the sky.
This is why we get to see such amazing things like eclipses.
Now, knowing this, you can take, for example, the tip of your finger, and hold your hand up, you can close one eye, and you can block out the sun with your finger. From your vantage point on earth, we know you can do this. (We are not recommending you try this! Just take our word for it. You should not try to look at the sun...)
However, you go out at night and you hold that same finger up in front of the moon and close one eye, and you can't block out the moon.
So, you can block out the sun with that finger, but you can't block out the moon.
Why is that?