Jason Russell, who directed the 30-minute film Kony 2012 that went viral earlier this month, was detained by police last week after witnesses reported a man in "various stages of undress" who was "acting bizarrely, running into traffic" in public.
In a 30-second video on TMZ, Mr Russell bends over and slaps the concrete pavement before yelling out "iPhone Siri" and clapping quickly.
The gossip website published the mobile phone video after it was shot from a passing car in southern California last Thursday morning.
"Jason's incident was in no way the result of drugs or alcohol in his body," his wife, Danica, said in a statement on the same day an anti-Kony resolution came before the US Senate.
"The preliminary diagnosis he received is called brief reactive psychosis, an acute state brought on by extreme exhaustion, stress and dehydration." Read More