Police dog catches carjacker, officer caught racing a lambo...Top motoring clips of the week

Cape Town - From a dog catching a runaway carjacker to a to a police patrol car caught racing a Lamborghini... here is your weekly video wrap.

Helmet-cam footage of a motorcyclist captures the moment of a near fatal crash as the rider loses control and slides under a semi-truck.

A highway patrolman is under investigation as a video shows the officer racing his patrol car against a Lamborghini.

'What a good boy!'

A police dog, called 'Puskas', was the star of an epic police chase, as the crime-fighting pooch caught a car thief. Then, a bus carrying 20 passengers, without its driver, was seen rolling down a state street before crashing into a traffic light.

WATCH: Tesla Model X vs Jeep Trackhawk

The horrifying moment a driver chases after runaway bus loaded with 20 passengers

What a good boy! Crime-fighting dog catches carjacker

WATCH: Policeman caught racing a Lamborghini Aventador

Whoa that was close! Rider loses control, slides under huge truck