Tira and I had a big 350 in our Camaro with all those cool hod rod parts attached. Big cam, re-worked crank, quality bearings and rings. Heavy duty timing chain, roller rockers and generally improved double hump chevy heads. We had hooker headers that blew straight down the dual exhaust through a couple of cherry bomb glass packs.
Anyway, it was definitely LOUD, even at an idle when it was just loping along. The problem is I hardly kept it at idle. One day Tira and I were going through a drive through teller at a bank, (remember those old fashioned banks where you actually had real live people?) and we were maybe 5 cars back in line. We moved up a little but it was hot and the line was slow and I was getting impatient so obviously my answer was to play with the gas pedal. We finally moved up closer to the window and were the third car back.
About this time I notice a lady walk from around the bank and start winding her way between cars to where we waited. Imagine my surprise when she stopped at my window! Turns out she was one of the tellers and she had come out to ask me to turn off my car because they couldn't hear the guy talking into the call box at the front of the line! <bg>
Well, that's it. I guess maybe you had to be there... :-)