Ade B
MB Enthusiast
For that to happen the deformation of the car and bike would have to be elastic, which they are not.
If the car was stationary and the bike ran into it, the bike could only continue forwards or stop at the crash point. It may make the car move away due to kinetic energy as whichever object has the greater kinetic energy will control the movement of the other object.
Video example, note how the bike front wheel locks on impact and the car moves away.
This gives the impression of the bike moving backwards.
another example.
Both the video examples are bikes of some heft - in fact I don't believe they get heavier than a Goldwing.. The bike in question was a Buell, which despite being based on Harley mechanicals, will weigh a lot less. Whilst Buell make some big claims for their machinery, defying the laws of physics aren't one..
Ade