only thing i don't get is:
when and how did 'rabbit' learn how to drive?
it wasn't the fall from her 16th-floor penthouse that killed her, it was the stop
I was thinking the same thing when I saw him driving.
If it harms none, do what thou wilt.
In the movie you never see him drive!
When he returns from his real father at the end, he enters the garage with the taxi still in it.
The only question might be, why we can hear the motor get started during the end credits.