Premise: Police are investigating after a motorcyclist and his pillion rider were seriously injured in a crash near the Perth CBD last Wednesday evening. About 9.25pm, the 22-year-old man was riding a red Yamaha 125cc motorcycle north with a 17-year-old pillion passenger over the Narrows Bridge along the Mitchell Freeway. The motorcycle involved in the crash. Credit:WA Police As the motorcycle passed the Mill Point Road exit, it was hit by a silver 2005 model Honda Accord. The rider and passenger were thrown from the motorcycle and received serious injuries.
Hypothesis: The passenger's serious injuries were due to him being thrown from the motorcycle and not wearing a helmet.