Don't slam my door!

We caught a cab the other night and after hoping in and closing the door, I started to tell the driver our destination, but before I could finish he was talking over me and asking why I slammed the door so hard.  I was a bit puzzled by this, paused then gave him our destination.  I found the words "the wind is strong" (which was true).  Then at the next light he reached across the cab and opened and gently closed the door in demonstration.  I then found the words to say something to the effect that in most old cabs you have to pull the door hard to close it.  I couldn't remember the word for I'm sorry.  Kind of weird.  I've never had a cabbie complain that I slammed his door to hard.