system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do they build those rickety rope bridges? I can't wrap my brain around it...

They always seem to be in the middle of nowhere and I just don't understand how it could possibly be constructed. I'm imagining that they pre-construct it, have a buddy stand on the other side and continue to toss it over until it finally makes the gap.... this cannot be the case. Please Explain!
gpt
Generally you take a thin rope that's a lot longer than the gap, secure one end and take the other end the long way, down through the valley or whatever. You pull it tight and secure it, then you can use that rope to pull across a bigger, heavier and stronger rope, and do that as many times as you need until you've got enough strength to carry workers who build the thing out into a full bridge. Yes, this does mean hanging from a few ropes over an abyss while building the bridge.

Sometimes people even take the first string across with a kite.