Laying down in the warm embrace of mother earth is safe. Staring up at the clouds never injured anyone. It is the safest thing you can do.
After a while though, some bright person gets the idea to stand up. Standing is OK, but it leads to falling. Falling leads to bumps and bruises. But isn't too dangerous.
Then at some point some bright person stood on the edge of the water and said, “I wonder what is out there?” SO he walked out. This lead to the invention of swimming, drowning and making promises to God. But it was still fairly close to land. And it was sorta dangerous.
Some smart person came up with the idea of cutting down a tree, hollowing it out and rowing out in the middle of the water far away from land. This lead to the invention of bankruptcy, fishing lies and drunk sailing. The problem with boating is what happens when something goes wrong. Sure you could swim, tread water, hang on to a piece of drift wood, and hope that helps finds you before the sharks do, but after that the whole drowning thing comes up again. And it was moderately dangerous.
When man decided that this wasn't hazardous enough he looked to the sky. Birds can fly, why can't man? SO man built hot air balloons – which lead to the advent of great burning balls of gas in the sky. Then he invented propeller aircraft, helicopters, jet airplanes, spy planes, and airliners. With each new invention he went higher and faster and things got exponentially more dangerous. When things go wrong, however, there are limits to what can be done. So man invented parachutes, which lead to the invention of scary videos of failed parachute openings and hilarious videos of errant parachutist being dragged across the ground by rogue winds. And it wad very dangerous.
Then man said, “I must go higher” and so he took huge paper towel tubes and filled them with the most volatile liquids they could find, set it on fire and blasted away from earth – which lead to the invention of brown streaked Fruit of the Looms and Tang. Man build more rockets ships, satellites, shuttles and space planes. And it was very very dangerous. When something goes wrong in space...well things just go poof.
And then shrapnel and debris come hurtling back to the ground. Right to where a man is laying in his back yard looking up at the clouds.
Maybe laying out there isn't so safe after all.