'Rule of thumb' will help you tell if you will be safe in the event of a nuclear bomb

First things first; don't panic, we're not suggesting a nuclear war is in any way a likely possibility that would require you to swot up on survival techniques.

Then again, he said 'I'm not bluffing', which is exactly what someone who was bluffing would say.

If you should ever find yourself in such a situation that the bombs are dropping then you have my sympathies, and gauging your chances of survival could all come down to something called the 'rule of thumb'.

Simply put, if the mushroom cloud from the nuclear bomb can be completely covered by holding out your thumb then you're probably safe.

While that might be the case, nobody would blame you if you thought it was still safer to turn and run in the other direction to look for somewhere you can find shelter.

If you can't cover the cloud by sticking out your thumb then it's time to point yourself in the opposite direction and go as fast as you can towards the most appropriate shelter.

Again, don't panic. We're not suggesting a nuclear war is close, we just like to keep our readers informed.

One group of people who are probably already familiar with this rule are fans of the Fallout video game series, which is set in a post-apocalypse United States that was destroyed by nuclear weapons. (Calm down, it's just a game, guys).

Franchise mascot Vault-Boy is usually depicted in a pose where he's winking and giving a thumbs up to the audience, but many fans have realised his pose is a pretty good demonstration of the 'rule of thumb'.

There are a few other things to consider here too, as sticking your thumb out to cover the mushroom cloud doesn't mean you're totally safe, especially as the winds sweeps radioactive fallout across the land.

If at first the blast doesn't get you, you can pick from a plethora of potential deaths including radiation and starvation, so definitely raid the biscuit tin before the Mad Max wannabes get you for your hobnobs.

While you'd possibly want to stay out of the cities to avoid being one of the many millions who'd be incinerated by the bombs, you could avoid the post-apocalyptic starvation as Australia produces enough food to support their population.