This is Singapore and not the US.
I dont think the guy have any chance of winning. He should spend his time looking for a job. Now he has to try very hard to win because no company will a dangerous person like him. Who knows if he will sue the company if a stapler drop on his leg.
This is an act of nature, it is the sea and not a swimming pool. When you walk into the sea, you have already accepted that you may drown, have skin allergy, etc.