I sure do. August 1986, just after my 12th birthday. Did a 2 hour referees course with my Dad. He and I did our first game together that week, an Under 19s boys game. One player gave me a bit of a hard time, mainly based on my age (and I was skinny and wore glasses). He picked up two Ts, both from me, got ejected and then copped crap from his team mates and the opposition about being booted by a kid
I immediately got a rep as a bit of a hardarse that wouldn't take any rubbish
I know that my old man really loved refereeing with me, at the time I didn't see what the big deal was - but it sure is something I miss now!