We are never 100% safe. There is litterly no place on the entire earth where you can hide. If you go agin st a wall, something can sneak up behind the wall and go through it. Something can go through the ground and attack from undress you. Something can attack you from above and drop a bomb on your head. If you lie flat on the ground, then something can once again go underground. If you go underwater, if the water pressure lack of food and water, or the lack of sunlight doesn't affect you, then someone can poisin the water and kill you. Then can attack from basically anywhere including on the suffice of the water if a bomb is set off there (the sonic boom is would give you the Bends and then you would die.) In the air, lack of oxygen and the freezing cold air temperatures would kill you and about the same (except for the sonic boom of a bomb on the water surface) thing could happen to you in the air. If you go underground, the the wieght above you can easily crush you but there is also the chill and lack of sunlught, then a flooding above ground could drown you, an earthquake would crush you and you can see what's surrounding you outside if you are underground so a bomb in on the earth's surface would work or a tunnel right beside you could be dug and you couldn't see it. Idk if this makes any sence but I thought of the is a few days ago when I was feeling very paranoid .