Shocking moment tyre bounces across road and knocks person out

This is the shocking moment a rogue tyre knocks a man to the ground.
The bizarre incident, captured on CCTV, sees a man calmly walking along a street.
Then, out of nowhere, a tyre appears rolling down a steep road.
It bounces once across the street before hitting the man straight in the head, knocking him to the ground like a ragdoll.
Shocked pedestrians quickly turn to look at the scene.
It is unclear where the footage was filmed or if the man survived.