Every mission trip that I’ve ever taken to Merida Mexico has included sleeping in hammocks. It may sound a little uncomfortable at first, but you get used to it. The hammocks are all handmade by local Mayan people in the same manner that they’ve been making them since the days of Christopher Columbus. You can see the basic process in these photos.
A great website that has a video and explains the method in more detail can be found at The Ultimate Hang – Weaving A Mayan Hammock.
No one would be foolish enough to attempt sleeping on a single thread hanging between two trees, no matter what strength the thread possessed. It would be physically impossible to balance yourself and all of your weight focused on one thin thread would be terribly uncomfortable. But woven together, with your weight distributed equally among multiple threads, the idea suddenly becomes feasible.
Ecclesiastes 4:9-12 (NIV)
9 Two are better than one,
because they have a good return for their labor:
10 If either of them falls down,
one can help the other up.
But pity anyone who falls
and has no one to help them up.
11 Also, if two lie down together, they will keep warm.
But how can one keep warm alone?
12 Though one may be overpowered,
two can defend themselves.
A cord of three strands is not quickly broken.