Kingpost, I saw one a few steps up from that...
SZR, going towards trade Centre, idiot in white sedan missed the turnoff that takes you to Emirates Towers/DIFC. Instead of just going up to the roundabout and going around past Zabeel and down the back way, the numpty proceed to stand on the brakes and then reverse up SZR (in very fast moving traffic) not just to the missed exit but to the one before (down near Johnny Rocket/Dusit Thani)
Nearly caused about 6 pile ups and I have no idea how no accident happened with trucks are cars careening around him into the other lanes (he didn't even put on the requisite hazard lights- as if that does anything!!)
I was in such disbelief I actually filmed the whole episode. Absolute muppet!!! (I was not driving at the time)
Yes the video did get sent to Dubai Police. No idea if anything ever came of it.