When you take a super powerful, long piss after drinking a Jamba Juice smoothie. The urge to take a Jamba piss usually hits suddenly, about 30-45 minutes after finishing a smoothie, and it feels like your bladder is about to explode. There is no warning sign.
Mike: "Hey man, what are you doing in the library?"
Jim: "Not much man, just reading some... OH SHIT I GOTTA TAKE A JAMBA PISS, WATCH MY STUFF!!!"