Neat and convenient coincidences of planet Earth (and other planets)

[Khedrac]

Water still mostly behaves normal outside of a tiny bump in the curve.

If you mean the temperature : density ration it's actually 2 bumps - a small one for liquid water and a larger one for the liquid solid transition.

And I agree that they are just bumps in the straight line, but we probably wouldn't be here without them as they permit complex life to survive in shallow water temperate environments, which makes them exactly the sort of thing this thread is about.