1. Aliens come not for peace but for new land, humans will go complety extinct. 2. Nuclear war: Yea we've heard of Fallout 4 with a nuclear bomb wiping out most human life, but what if that came true? Well When WW3 comes around(In about 15 to 20 years) then we all better be ready. 3. You see a blinding light, flashing and killing people and you're about to be one of those dead people, and what killed you exactly? Well it was simply a Gamma Ray. 4. The "Zombie Virius". I know the dead coming the feed on the living is impossible, but what if there was a virius just like it? Would You Be Ready? 5. Humans kill ourselfs. Can you imagine a world of anarchy becuase we rebelled against all of the countries governments? Well it could happen with whats going on around the world so....be ready for anything.