I don't like to let freon out into the air so I was hooking my 37 Buick up to the freon evacuator when a hose separated and whipped around like a cobra on steroids. I put luminescent dye in each system installed so any leak is easy to find. It is dissolved in the refrigerant oil so the the whipping line slung oil spray/mist/droplets over the entire car. After uttering a few words not often heard in sunday school an idea hit me: turn off the lights and shine a UV spotlight on it. What a light show! There was lines of all shapes, round and teardropped shaped drops, mesh patterns, you name it. I wish I could take a picture of it so Russ could air brush something like it but the camera flash does away with the affect.