As a boy, I jumped from an airplane. The instruction was to lean out the open door, grab hold of the strut, and jump out. Then at the instructor's command I was to let go. Not letting go at the right time could have 'damaged' me. I did let go, the rip cord did its job and opened the chute, and I landed safely if not gracefully in a cow pasture to the relief of my folks.
When it comes to letting go of people, things, wantings or emotions, it can be more complicated.
The 'letting go' of that type which stands out in my mind is when I let go of old beliefs and dependencies. It was very tough, as I had not yet learned to let go in the moment, and the emotional pain ran deep for years. But in the end it was one of the best things I have done for my life, as I grew into my Self in ways not imagined.
I am grateful for all of your responses, and will ask each of you in emails for your permission to include your Answers (with a link to your profile) in a hub just published, 'Less is More in the Art of Letting Go.'
Then, I will have to delete the Answers in a few days to avoid duplicate content.
I like to do this to bring the perspectives of so much rich life experience and keen observations of others into the hub. There is of course no obligation, as I have let go of the outcome.