My wife has a WRX and she is also fairly well verse in car stuff (she follows F1 and the WRC) and knows the difference between a turbo and a supercharger. So when she bought her WRX, she pretty much had a solid handle on what she was getting into and what she didn't know - she learned, because she once told me - she hates to be ignorant about anything she is involved with.
So she comes home and tells me this dude at the gas station, driving a mustang, was trying to chat with her but also put down her car.
He said, "Nice looking hood scoop, is that for looks?" I assume he thought she didn't know anything.
She said, "No - it's to force air over the intercooler, to cool down the air heading into the turbo!".
She told me that he had a puzzled look on his face. Like he was shocked and had no idea what she was talking about.
She then said, "You DO know what a intercooler and turbo is, don't you?"
She told me his buddy in the passenger seat yelled, "SLAM! You just got punked by that chick!"
He was pissed and drove off.