If a Taxi passenger opens a door at a hotel entrance and a fast car hits the Taxi door as the open door who is at fault Taxi driver or passenger or fast car?

If the taxi driver was in the middle of the road then it wold be the taxi driver fault but if the taxi was on the side of the road then the dumb taxi driver should know that the rule is to open on the right side either way! duhhhhhhhhhhhhh