Mr Goh Chuan Kiet was struggling with the sail on his windsurfing board, as the rain suddenly came down and the waters got choppy.
His senior in school, Mr Brian Yu, who was on a paddleboard, spotted him. Mr Yu suggested that they swap boards so he could paddle back to shore.
Mr Goh agreed.
But he might have possibly been afraid that Mr Yu might get blacklisted for not wearing a life jacket.
So Mr Goh passed his life jacket to Mr Yu, who was not wearing one.
That may have cost Mr Goh his life.
He later disappeared in the sea. His body was found two days later.
Yesterday, a coroner's inquiry into the Singapore Institute of Management (SIM) undergraduate's death was heard.