Davide Di Giorgio was taking video of today's rain when he captured the moment the bridge collapsed.
He told CNN that he was filming the weather from the window of his office when the bridge gave way.
“I wanted to show my family, who lives on the other side of Genoa, the heavy rain," he said. “As soon as I turned the camera to record the rain, we heard a loud noise and the bridge collapsed. It took me three seconds to realize what happened.”
He added: “My colleagues and I were shaking ... I saw it from the camera of my smartphone so it was unreal."
Watch the footage here: