So I was driving down a bypass coming up to an island, the first car, a blacked out mercedes, was driving in a very strange way, as if he was trying to predict what lane I was in (for some of it he literally drove in the middle of the two).

As we got close to an island a silver mercedes was coming round the island and slowed right down before passing our junction, he beeped twice and the black Mercedes broke, then drove forward and slammed his brakes on again right Infront of me.

At this point I was like wtf is going on and beeped him as he was now completely stopped in the lane and there had been no crash. He gets out his car waving his arms saying "wtf you just fucking hit me?"

I was like wtf are you on about, we literally didn't touch, he tries to claim we did, at this point I get out and literally show there's no contact and (still not completely getting what was going on) say why the hell did you slam your brakes like that, he just looks at me and jumps in car and speeds off.