One of my first servers I joined "back in the day" was Diggy's Metropolis RPG, forever getting stuck under the roads or getting shot by a gang of criminals. That server had my first build which was a mini bar.
Along with that, I didn't understand the events system that well, so to make a light switch I'd have two blocks and have onPlayerTouch events on them. God, I've come a long way.
Haha