Cloud
Most clouds are found in the sky, where the clouds are; a cloud on the ground is called fog and is considered lost.
Sun
The Sun has risen in the east every day on record, a streak experts describe as ‘frankly suspicious’.
Gravity
Gravity is the force that makes things fall down, and is the reason toast lands butter side down, out of spite.
Rain
Approximately 100% of rain falls downward, with a margin of error of rain.