A group of cavers was in Cass Cave in West Virginia, and used a 40-foot piece of orange nylon webbing for a handline on the climb up to the Belay Loft. When they exited the cave, they found the webbing to be missing. It had been taken by cavers of another group. The cavers who had placed the webbing were able to exit safely since thay had additional webbing.
NSS News, December 1989 (Part 2) V47N12, Page 324.
Dead Dog Dispatch Vol. 3, No. 10, October 1988.
No analysis has been done.