At what point is it too late to let go of a balloon?

If you are holding onto a very, very large helium filled balloon & it was slowly taking you skyward, at what point is it not too late to let go & still successfully land without ending up being buried in 3 (small) separate caskets?

My logic—- As the balloon slowly lifts your heels & then toes up off the ground, you feel like maybe you have just a few more moments of floating bliss. But then reality kicks in…nerves are firing on all cylinders. You hesitate to let go when you are 10 feet off the ground. You think, maybe a calm downward wind could push me a little closer & I’ll definitely let go. That calm wind never shows up, neither does an African termite mound or grassy knoll. Your brain flip-flops. The longer you hesitate, the higher you go. You’re stuck on that balloon until you let go.

At what height do you close your eyes, say a prayer to whomever/whatever you believe in & finally say to yourself, ‘I’m letting go!”

-Waiting for a large body of water is cheating, along with waiting until you’re at skyscraper rooftop height. For scenario sake, it will always be same level ground (no canyons, no mountains) with no water.

The highest point I think I would let go at, would be around 70 feet. I’ll probably be shopping around for custom rims for my new hoverround afterwards, but I think I could handle 70 feet.

What about you guys?