To add extra annoyance to me whilst I am stuck behind a car that has an arm flapping driver is that they do not use their indicators either! By then, I am screaming and biting the steering wheel. The slow down ones, the “I’m turning right”. The same ones you would use whilst performing your cycle proficiency test. The lack of using an indicator or the hand signals.
I learnt to drive in London so city driving, honking my horn and using language that a builder would blush at is common place to me. I must add that I lived in Dubai for 5 years and thought that I had seen every crazy driving move known to man and felt grateful every night when I got home from work, car and myself unscathed. Many things annoy me about the standards of driving here.