the first server i joined was on a small group of islands where i made a runway and an airport with some guy and we shuttled around exploring the map (which i did not know was infinite at the time) on magic carpets and flying jeeps
the first thing i did on blockland, though, demo and all, was i tried to make a ski route and starting gate with 150 bricks and no paint for some reason on the slopes. i think i was caught really off guard by the fact that i could tumble and thought it was hysterical