11 Common Movie Tropes That Would Actually Ruin Your Life

3. Punching A Shark On The Nose

Forgetting for a moment that you will almost certainly never have to put this knowledge into practice, punching a shark on the nose is probably not a brilliant idea should one mistake you for some lunch.

The general idea is that a shark's nose is very sensitive and one well-aimed whack will be enough to send it packing. The good news is that this is probably true, but the bad news is that most people wouldn't be able to aim anything well mid-shark attack and, if you miss, the conveyor belt of razor sharp teeth is very close by indeed.

This, coupled with the fact that trying to punch anything underwater is like trying to run through treacle, makes the badass shark-punch a highly unlikely scenario.

If you do find yourself in the jaws of a shark, the best parts to go for are the gills and eyes. Okay, these are still relatively small targets, but they respond much better to a "panicked scrabbling" style of combat than the nose. Here, you can scratch, poke and gouge, rather than relying on your background in underwater martial arts.