Done it a million times....
Always when im doing something to the headunit and i forget, Heart jumps for a second and i think "ahhh wtf this time!" then i realise what i done and continue on my way
I did it once on my own and i didnt realise for about a minute.. started freaking out lol.. mind you.. i had parked it and left it in drive.... noooo idea why :/
and then once coming back from an exam my friend who got into the car first put it in drive before i got in so i didnt see it.. had a car full of people too and had no idea.. went to pop the hood, got out of the car and for some reason looked back in and saw it in D.
I did that too!! in my old mans VY SS... it was at a crowded beach and very embarrasing lol.. i didnt realise it was me a first even though the car was shaking it revved so hard lol... at least the engine wasnt cold (thank god for handbreaks!)