Surviving in the wild is something we should all be prepared to do, in case it ever comes to that. Nobody that's had to live off of the land has done it without understanding their surroundings and knowing how to survive.
Or maybe they got lucky as shit and a plane full of seemingly useless yet exceedingly useful packages crashes near the island they're on, leading them to surviving for three years and befriending a bloody volleyball.
Regardless, there are a plethora of useful tips and tricks for surviving the outdoors, some that you would never exepct, like starting a fire with ice. YouTube user Tim Jones shows how to make this sorcery happen.