The family of Jason Russell, the creator of the "Kony 2012" viral video and a co-founder of the advocacy group Invisible Children, said that "brief reactive psychosis" brought on his public meltdown on a San Diego street corner last week. "The preliminary diagnosis he received is called brief reactive psychosis, an acute state brought on by the extreme exhaustion, stress and dehydration," the statement reads. "Though new to us, the doctors say this is a common experience given the great mental, emotional and physical shock his body has gone through in these last two weeks."