I learned this too, the slinky traffic in a rig growing up with my dad. cars are like yoyos, and we always caught up to them. today it happens more than ever, as the rigs are in the 70s mph very easily. The only time ever to use power nominally at higher speeds was loong empty highway, further putting the wheelie poppers in there places. that hardly happens for alot of car makers' countries. It is my #1 gripe with ecomod. A car can go long distance, high speed and be economical in traffic...there are hardly any.
Anyway, I am glad that guy wasn't just being a jerk.
The sube and I are quite "blippy" in traffic, it is not intentional it is just a quick blippy stiff rally type kinda rolling fast buggy...and it is my slow mode. Ironic to your story.