Motorcyclist rearended and flips off bike

Travelling along Canberra avenue toward the city in an 80 km/h zone. Traffic had backed up ahead and come to a stop. As I came to a stop I checked my mirror and moved to the right of the road in case the car behind wasn't paying attention. I saw him come to a stop and relaxed, looking away. The next thing I knew I was looking at the sky - was the guy three cars back that didn't stop.