Billy Jack
ArboristSite Guru
How do they (the troops) use it to find trip-wires?
I can see why your into tree work. That looks like a cubic hell!
I am not former military so thank you for your service (and supporting the boys cleaning up that S-hole).
If you spray a strand of Silly String across a room, it'll "hang up" on anything that it lands on. Imagine running a piece of fishing line pulled tight across a room about 18" off the floor. If you spray a strand of silly string across it, the strand will droop off the floor, indicating something is there.
I hate using the photo as an example, but see where it droops over that cable? Just imagine a dark room with an almost invisible trip wire. The silly string will make it obvious.
BTW - my office is now about four times the size of that mini-cube. Still hell though!