Conditions were light rain, incident occurred around 9:45am between 6th & 7th ave on 54th St heading east on the bike lane.

There's a pedestrian avenue called "6 1/2 Ave" with a stop sign for motorists. Usually the cars stop there, let pedestrians by then continue. However, even with a long line of cars behind him, the cab decided to let the passenger out on the left side into the bike lane while stopped at the stop sign, flinging his door directly into my path with no time to react. Hit the door and luckily had a soft fall onto the street with no injuries save for a sore heel (had a helmet on but didn't make contact), but shocked me pretty badly. After making sure I was ok, passenger said "I sure learned my lesson". Then the cabbie asked if I was OK, then turned around to see the guy running away on foot.

Lucky I didn't sustain injuries, but will make me super paranoid about stopped cabs from this day on.