My son's a mimic... one of the most hilarious things EVER (and mortifying for 2) was when he was 3ish and imitated everyone he drives with when they're ticked at another driver. He did full on body imitatrions (slouching, sitting up, where hands are placed on the wheel, and launched into "little pots have big ears" / aka watch how you behave around kids routine:
My mum : Waving fist out the window and using operatic projection "JACKASS!" glance into the backseat and big eyes and pulling arm and head back into the car, "... Whoops... you know that means donkey. Nana just said DONKEY. Lets not tell your mother."
My dad : Leaning back in his seat with a resigned sigh "Geeeze, Buckwheat what's the hurry?"
My husband : Slamming both hands on the wheel, then gesturing with one hand (not the finger, italian type gesturing where the hand punctuates every syllable) and yelling. I can't edit it safely for this board. Suffice to say NOT language I want around my son (neither is the other word for donkey).
My sister : An almost Elvis like snarl with her lips, narrowed eyes, and a growl and the patented "mutter" (NONE of my siblings or I yell at cars, we grew up pleading with my mum/ trying to convince her that the OTHER cars couldn't hear her, really, esp not with all the windows in both cars up... my mum is like Mystery Science 3000... it's a constant diatribe of other people's driving.)
Me : Tilted head and raised eyebrow: "Duuuuuuuude. "
It was a one man / round the table roast of every driving adult present. I have to honestly say... I'd never notice how *I* respond to bad drivers, but he was dead on for all of us. Laughter and blushes and faces hidden behind hands all around the table.