Was back when I was 13 years old. Found a squadron in the TA that looked pretty cool. Flew only Spit 9s (the dweeby spit back then) and seemed to teach the basics. The "entrance exam" for said squadron was a monitored (by the CO) dogfight with the recruiting officer (note that damage was turned on in the TA back then). This all seems cheesy now, but I was a 13 year old brand new to the game, and I thought it was awesome.
So, we go up over A1. The other guy starts a slow flat turn to the left, expecting me to fall out of the sky at first movement. I'd been into planes long enough not to fall for it. I went into a nose-down left turn until I got mostly around on him, pulled the nose back up, and fired. I missed in front of his right wing. BUT! My stray rounds blasted the cockpit of the CO who thought he was watching at a safe distance.
My first kill was on the CO of my first squadron.