Whenever I am behind a vehicle trying to parallel park , I stop and let them complete the maneuver before continuing.
But, I've noticed fairly often that other drivers do not extend the same courtesy when I am parallel parking.
eg, today i was performing a parallel park (followed the rules, signalled, stopped, started reversing), but the cars coming up behind me (and a cyclist ) drove around me while i was trying to reverse into the parallel park..... this is dangerous because it seems those same drivers are incapable of predicting the trajectory of the front end of a car reversing into a park - meaning i need to slam on the brakes to stop the front end of my car from colliding into them while they pass. The cyclist went all nuts too because i nearly smashed him over too. Didn't even see the cyclist as he was behind the first car that went past me.
So, what is the rule here? eg, if i had smashed over the cyclist who is at fault?