Based loosely on the Chaos Theory. Each move starts with a reaction to the previous move and ends with an action incrementally greater than the previous. With chaos ending at the usual place.
...leaving the way open for moles to establish dominance over humans. The moles forced humans into slavery, digging vast networks of tunnels underground, until the stability of the Earth's crust was reduced so much that the whole surface of the earth collapsed inwards...
...the increasing mass and gravity of the centre of the earth overcame nuclear forces and not only sucked in the remaining mass of the earth into an area the size of a football, but also dragged in nearby neighbouring planets and the sun, meaning...