For the sake of amusement here's the chain of consciousness that went around that particular spot.
We've recently exited the 50 mph controlled zone, as I am on a mission (returning MiL to Cov) I accelerate gently (in contrast to most for whom it is the most important thing in the world to go FAST now) and I observe to my satisfaction that these days there are more cars that travel happily on the motorway at 55 ish than there ever were. There's one, in fact it looks like a Nissan Leaf - on the motorway! Wow (the other sort). Times are changing, I must tell Wow (that sort).... Oh.
Cue pulling in front, slowing, switching on hazards, waving arm in a manner that was wither waving or beating a passenger to death etc before driving off. One assumes that fam. Bagger were collectively engaged paying attention to the electric gauges rather than the road. In their defence my rear window is steeply raked so it may not have been easy to see the gesticulation. Or the waving come to that.
And no, splaining isn't in my vocab except as a contraction to explaining.