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When three guys with full bladders aim and let loose on someone who least expects it like a sleeping person or a poor soul stuck in traffic.
My cousin did a Pittsburgh Three River on the driver stuck in traffic. The man was screaming into his phone.
Three guys at the bar peed on a sleeping man. He woke up and yelled, 'What the hell was that?'
At the concert, three men did a Pittsburgh Three River on a guy who was trying to enjoy the show.