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1.
Dropping recyclable, breakable, loud, heavy, or just obscure objects off of tall buildings. Usually the objects are to land on pavement, causing a loud noise or shattering, shocking those around it.
Rusty- "Dude, why are you going to court tomorrow?"

Julie- "Funny story, i was Rooftop Recycling off a four story parking garage and a beer bottle nailed some lady."
by Lil' Cake Monster September 04, 2011