Security camera vision has captured the frightening second before a teenager riding his bike to work in Perth was hit by an accused hoon.

The young man was riding in Canning Vale this morning when he was struck by a car, which witnesses say was speeding.

The footage shows the driver losing control of his car, narrowly missing one cyclist but hitting another.

The driver ended up under arrest and the rider in hospital - injured but alive, his family says, because he was wearing a helmet.

Camera Icon The teenage cyclist was wiped out by the out-of-control black sedan.

Thrown into the car windscreen by the 8am crash, he has a badly broken right arm and shattered knee.

Witnesses told 7 News Perth that the driver had said the car was new, that he got the keys yesterday and was “testing it out.”

They say that on a road where the speed limit is 50km/h, he was travelling significantly faster.