I'm planning to run down the beach to watch the drowning man.
That's a strange thing to do. What makes you want to do that?
I just want to get a better view of him drowning, I like seeing people dying.
If a man is drowning you should try to help him, not just run down to the beach to get a better view. You should try to save him from drowning, either by swimming out to help him or by alerting someone who can. If you just watch him drown then he'll probably die.
I'll stay long enough to make sure he is going to drown.
I feel like you're being mean about this and there's something cynical about the things you have said where you want to watch someone to die by drowning. I do not think that is a behavior that you want to have in life, so I suggest you get professional care about this so that you would gain empathy with the people around you, as it is needed to be a valuable part of society.