In retrospect, these new sports seem faddish at best, but at least we can appreciate how they reflect the most important innovations of the early 20th century. The Golden Age of Aviation inspired bubble-chasing, where daredevil pilots competed to pop helium balloons with their airplanes. Back on land, the commercialization of motorcycles and outboard motors gave us a least three new varieties of polo: motorcycle polo, pontoon polo, and of course, water-horse polo. Hobbyists borrowed elements from pre-established pastimes to create their own sports. For example, one French meteorologist adapted his interest in winter sports for parachute sledding (similar to modern-day snowkiting), while beach-going Europeans used human hamster wheels to run on water.