I love the way horns and headlamp flashes seem to happen when you overtake. Always of course with a considerable delay while the driver finds the switch (or engages the brain cell) to indicate their annoyance.
Being a biker with no shortage of acceleration I often overtake and I hasten to add with care and considerations for others and I don't have a tin can and air bags around me - Im no idiot. I also don't want to be lumped with the sports bike power ranger nutters we get at this time of year.
So many road users hate being overtaken. Oh yes, they'll trundle along at 40 with a queue jammed behind and maybe creep up to 50 when they forget to check the speedo but they just hate being overtaken and they also don't like people overtaking on the opposite side of the road. I wave back.
Doing it in a Fiat Panda doubly Ps them off because they know you have minimal power and costs a fraction of their PCP funded Nissan (Butternut) Squashquai. Sadly it hardly ever happens because you normally never have enough space to safely overtake.