Blimp mooring masts are set up like old fashioned circus tent poles, with guy lines anchoring them from the top of the pole to stakes in the ground. To stand on the crows nest, you have to slip your body through the cables, and if you are fat you have to wedge your body through. While doing this, my Benchmade Aries snagged on the cable and was launched from my pocket. The blade had flipped open, just missing the envelope of the blimp and nearly striking one of my co workers. I don't carry knives up the mast anymore, unless it is a multitool, and where it won't snag.