Oregon City Police spotted the suspect, Ernest Kirk, on a cliff near a bridge and attempted to talk to him. Kirk, who allegedly was naked and touching himself at the time, seemed to be under the influence of drugs.
It was difficult for officers to communicate with the 31-year-old because he was about 75 feet below them, and Kirk "continued to masturbate in front of them for several minutes," KPTV reported.
The Clackamas County Sheriff's Office Marine Unit was called in to assist with the situation. When a boat approached Kirk, he appeared to pass out and fell into the river.
Authorities were able to haul Kirk into the vessel, and he was taken to a hospital for a medical evaluation.
After he was released, Kirk was arrested and booked on charges of felony public indecency and harassment. He also was cited for a parole violation.