The hottest new underground sport, full of CRAZY, INTENSE ACTION. The goal is to stack as many rubber ducks atop each other as possible before your tower falls. Competitive duck stacking circles can be found in underground clubs if you know who to ask.
"Hey man, have you ever tried Duck Stacking?"
"Tried it!? Dude, I did a quadruple-helix megastack of 5 ducks, yesterday."