One other perspective to consider: if when you turned to look at the driver he/she wasn't laughing at you, then I would be unlikely to attribute it to malice. Perhaps the driver was anticipating racing around you, or simply hit the gas hard by mistake. I bought a new pair of shoes recently and the first few times I drove with them my starts and stops were a bit abrupt as I got used to the new soles stiffness. Just some thoughts. You did an excellent job handling it.