If the earth were flat, water would cover everything in a layer two miles deep.
If you don’t have a telescope projector or welder’s glass to watch a solar eclipse, just look for the nearest tree. The shadows it casts will be in the same crescent shape of the eclipsing sun as an inverted image of it projects through gaps in the leaves.
“Monster” waves at over 100 ft. tall can suddenly appear at sea when there is no storm to cause them.
Socks and shoes may be knocked off if struck by lightning.
Once in England, because of a water spout, it rained frogs.