360 timelapse: A parachute is like a little nylon machine with all of the parts designed for light weight, durability and as few problems as possible during deployment. Considering the speed at which a skydiver is typically free falling -- about 120 mph (193 kph) -- and the lack of options if something goes wrong, a parachute rig needs to be incredibly reliable.

There's a lot of popular interest in the fine art of parachute packing. It has all the elements of great drama -- a person is folding a piece of fabric and stuffing it into a very small bag, and there's another person whose life literally depends on that fabric unfolding properly.  https://adventure.howstuffworks.com/skydiving3.htm
So there;s so many things to do before jumping parachute but when it comes to the real thing it's just several seconds