Setting – the largest winter playground in North America. We are flying down Everest, a human chain of inner tubes, each of us squealing deliciously, eyes squeezed shut, hearts drumming loudly in our ears. The vertical plummet straight down, as soon as the gate lifts, has me clutching even harder to handles on either side of my tube while simultaneously also wrapping my triceps around my younger daughter’s boots and grounding us both. All that planking at the gym literally paying off right now in this moment as we scream all the way down. At the bottom, when the ground levels out and the tubes finally slow to a halt,…