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The officer ordered Goodin to the ground, police said. The officer said Goodin initially sat on the curb, but then stood, reached into his pocket and threw what could be a wallet into the water below.
Meanwhile, the victim landed in the water below and was picked up by someone in a rowboat.
The man told police said he was trying to defend a woman Goodin had approached just moments earlier. The suspect and the woman were arguing about a prior money exchange, police said, before Goodin struck the woman in the face.
Police estimated the distance from the bridge to the water below to be around 30 feet. There are concrete pylons in the water that the man could have hit that could have resulted in serious injury, police said.
The man who landed in the water refused medical attention and did not want to press charges, police said.
Goodin was arrested on battery and disorderly conduct charges.
Police also said the incident was captured on surveillance video, but officers have not released it to the public.