if you were thrown overboard while on a honeymoon cruise or an afternoon deep sea fishing trip, then this will serve as a re-creation of the last thing that you saw.
if, on the other hand, you are thinking about throwing someone overboard while on a ferry ride to a nearby island or a glass-bottomed boat sealife tour, this is an example the last thing that person might see. as you can tell from this example its pretty scary. so if you’re shooting for scary this is definitely the way to go.