Why do peoples shoes come off when they are in a car accident?

Question

Why do peoples shoes come off when they are in a car accident?

Answer 1

Sometimes the impact is so great that it causes people to literally get knocked out of their shoes or even clothing, especially when they get thrown around in a vehicle or even out of it.

Answer 2

As stated above the impact or G-force is so great that in some cases your shoes are actually like stuck to the ground.