There are two possibilities. One was probably largely fluke though, if I'm honest.
Proper one:
Just under 30 yards out just to the left of goal, ball cleared badly, comes straight to me. Hit it perfectly (believe me, that doesn't happen too often) with the outside of my right foot on the half-volley. Ball skims the floor all the way, curling slightly to the left. Hits the inside of the left hand post (from my point of view) and in.
I know the distance perfectly, because we were on astroturf playing across a hockey pitch (60 yards wide), and I was just in their own half. More impressive because the goal was actually a hockey goal. It went at such pace, the keeper didn't stand a chance.
I'm very embarrassed to do this, but the only goal I can think of to compare it to is Roberto Carlos in Le Tournoi.
Oh, and not only does no-one else remember it, but in order to get the power I had both feet off the floor (kind of a low-level scissor kick) and therefore fell over. This led the opposite team to say it was 'lucky'. I apparently mishit it because I was falling over. Bastards.
Number 2 (and the one which probably was flukey)
Running into the area, cross from the right, but behind me. The only thing I could do was to flick a leg out behind me and backheel it. Somehow this worked perfectly, lobbing the ball over my own head, and the keepers despairing dive.
I can't think of a similar goal that I've seen scored to this one.