The small, tiny arachnid traversed against gravity within the confines of the domestic drainage system,
Falling precipitation caused a flow of liquid which cleansed the drainage system of said arachnid,
The earth rotated in such a way to allow light and heat from the giant ball of thermonuclear fire in the centre of the universe to cause evaporation,
So the small, tiny arachnid had another go at traversing against gravity within the drainage system.
I'm most pleased with the 'thermonuclear' bit
