Does anyone know how it folds? Flat vs umbrella? No one has them around me but I was going to call around and see if any of the BRU near my sister in MD have any Cybex strollers in purple potion and use the trade in, and I have rewards, to get it. If I can get a good deal on the Callisto I might just go with it; I love the purple potion! I want an Onxy because it folds up like an umbrella stroller and takes up less trunk space.