Yep I cleaned some sky lights that way. Parked truck on opposite side. Tied off to the trailer hitch, tossed rope over peak and then tied off with it so I could clean hands free. Jodi came home found truck snuggled up next to shop with rope going up and out of sight, she was thinking WTF? I was on back side dangling like a monkey blissfully cleaning the sky lights. Those that have met her can imagine the adjectives and compliments about my lineage and heritage that came out of her mouth. I have not tried that particular stunt for awhile now!