What's something that people do in traffic that really bothers you?

It bothers me when she drives a big ass SUV and stops unexpectedly in traffic - just at the moment when I reach down to crack open a window because I'm burning up - and after I pull over - because I hit her - I say that she stopped unexpectedly and she asks me, "didn't you see all the cars were stopped?" and I say, "actually, no I didn't" when I really want to say, "Are you FUCKING kidding me? I'm not Wonder Woman and I can't see through your fucking big ass SUV!" And, I look at her car and mine and wish her Happy New Year in Feb and hug her because there is no damage... I didn't expect to smell her clean blond hair and her clean dark work suit - But then my neck hurts the next day and I didn't exchange information because with all the crap going on in my life, I don't need my fucking insurance in on this shit unnecessarily... so I drag my butt to the chiropractor with my aggravated whiplash - yes, because I already have that from the last rear end accident I was in 20 years ago.