It has happened to me 5 - 6 times and each time I just drove the car giving the person a signal that if he didn't move, he will be under my car. And yes it scares them, they jump like anything aside and the space is yours. Then they shout a lot at you, but I just ignore as I know he can't do anything as I have not done anything wrong in all this !!
I don't care if the guy is a Qatari or not. If any one is a Qatari, doesn't make him any superior. It's your atticates that make you better.
Adeel Ali