There I am, standing at the top of a ladder, about 20 feet from the ground. I am so confident that I could put this large bounce house up on the garage shelf for my friend. She is afraid of heights, but I am not and am happy to help her. I get ready to set it in place, but it slips slightly. I don’t drop it, but I don’t have the best grip on it and the other items on the shelf have now shifted. I try again, unsuccessful. At this point, it is getting heavier. My friend stops t