For the love of god, and all that is holy, can we please get back on topic?!
While cyclists mildly annoy me, I think the duty of motorists is to keep an eye out for the more vulnerable users (note, I did not say 'owners') of the road.
The disco driver looked what I saw to be a dangerous reversing manouvere, and irrespective of the type of car that did it, I'd still feel the same way. Reversing at speed, on the wrong side of the road, knowing that cyclists are near (the driver did just pass them), is irresponsible.
As for the video / series of event leading up to it, we may never know. Depends on whether you are on team cyclist or team disco as to what you'll want to believe...
https://www.aulro.com/afvb/images/im...016/02/685.jpg
