http://www.halfbakery.com/idea/Shark_20defence
Using this new information, I have reformed the question:
Hypothetical-
So your <s>swimming in</s> <b>standing on</b> the <s>ocean</s> <b>beach</b> and there is a <s>Great White Shark</s> <b>coconut</b> heading your way. There is no way you are gonna survive the encounter. Would you rather
a) have the horrible surprise of being attacked with no foreknowledge.
b) Watch the <s>shark</s> <b>coconut</b> coming towards you, knowing your chances are grim, and try and fight it as it <s>eats</s> <b>hits</b> you?
Yes, I do realize that the coconut statistic is likely fictional, regardless, the annual number of shark deaths worldwide is low. Around 54 annually it seems for the last decade.