There wasn’t a zip line when I was going to Lum’s Pond in the 1970’s with the scouts.
Lots of mosquitos.
I’ve been to that place several times and another Go Ape in NC a few weeks ago Their safety system should be bulletproof. Before you go up, everyone gets a long and detailed safety orientation. Harnesses are double checked. Cables are color coded and at least one is to be connected to the cable at all times. Sad to say, but I call this her fault.