Bullshit.
If you were in a position that you had no knowledge of the motion of your door (which would put you several feet away from it at the very least) then you wouldn't know whether it was a tap, a slam, or several taps or slams.
You know you opened your car door into his truck and you're just trying to portray the event so as to put you in the best light so that people here can say things like: "OMG! What an asshole that guy was, Darky!!!! You were SO in the right and that guy was so WRONG!!!!1!! You should have totally kicked his ass!!!!" And, if they were female then they'd continue with: "Take me, Darky!!! I give myself to you for mating purposes!!!"