yeah how bout that...
it suddenly stops...
its called...wait for it...
DYING...
Genesis 6:3
Then the LORD said, “My Spirit shall not strive with man forever, because he also is flesh; nevertheless his days shall be one hundred and twenty years.”
Psalm 90:10
As for the days of our life, they contain seventy years, Or if due to strength, eighty years, Yet their pride is but labor and sorrow; For soon it is gone and we fly away.
If you lived to be 180, 90 would only be middle-aged....