Basic zipline rigging concept by Dave Spencer 

From ‪@thetreespyder‬, I've watched this simple little video clip many times over the years. A basic zipline rigging system. This is by Dave Spencer, originally from the ISA bulletin board system (BBS) in 1995. BBS's were simple messaging boards back when the consumer internet was a new thing and we had dial-up connections. They were the precursor to internet forums. I first saw this clip about 15 years ago on the greatest forum of them all, Treebuzz, started by Mark Chisholm and Tom Dunlap.