Once. Was impressed by the human effort in general, little specifically stood out.
Worked in low voltage wiring through college. Have been a part of groups rallying behind large infrastructure projects; on farms, new office buildings, rapid response to weather related crisis (tornado alley). It's actually a very common human thing.
Been to many an art fair around the world and the minutiae of Burning Man blends right in.
Leave no trace while blowing fossil fuels into the air hauling tons of stuff to the desert. Nice loophole.
