Some people are rather impatient while you're learning to drive. Just because I'm literally 2 seconds slower to get moving than you from a traffic light, doesn't mean you have to beep your horn at me :/
I very much agree, I've been learning to drive recently on an intensive course, and while most people seemed fairly patient, some seem to get quite annoyed just because I was having trouble spotting gaps at roundabouts, beeping their horn at me.
Fortunately I passed my test on Friday.
