Officials say the ordeal began when the man went streaking past police headquarters in Downtown Seattle near 5th and Cherry around 10 a.m. Officers found the man running downhill toward Elliott Bay and ran off after him.
They were able to catch up to the man around Alaskan Way and Columbia Street, even managing to get one handcuff on him, police said. But the man turned and attacked the officers and ran off again, making it the four blocks to Colman Dock.
Video from a witness shows the naked man then climbing down a ladder at one of the ferry terminal's parking areas and dropping into the bay.
Seattle police and fire boats responded to the scene and were eventually able to pull the man from the water. He was taken to a local hospital for an evaluation, Seattle police said.
Officers later discovered the man had been at Harborview earlier in the day for a medical evaluation. It's there he ran off, shed his clothes and began his trek toward the water.