An Ultralight 5' x 7' Survival Shelter

 This video from WayPoint Survival came up in my YouTube feed today:

This is pretty darn clever, IMO. One thing I'd change would be to put a bowline knot on one end of the ridgeline and then use a marlin spike hitch to fasten that end around a tree, instead of using a carabiner. I.e., run the end of the ridge line around the tree, pull a bight (loop) through the bowline's loop, and then put a stick into the loop to secure it in place.