Because inertia is a property of matter.
Brake dance.
He left his foot on the accelerator.
The console. What was JFK Jr's wife drinking when the plane crashed? Ocean Spray.
Yo can I crash at your place?
It doesn't matter.
It doesn't matter (go ahead and down vote :P)
Build a wall
Because children inherit properties from their parents.
Inertia.
Bill Nye the Seance guy.