If you like a unique challenge, the Window Jump is definitely for you. The UKC and K-9 units use window jumps in competition and training. This jump requires precision and implicit trust in the handler. Your dog can not see what is on the other side of the jump (a drop, a walkway? It could be anything!) and has to jump clear through the opening.
Training a window jump isn’t much harder than training a dog to jump through a tire. Start your dog walking through it, then hopping, before raising it to your dog’s jump height!