When you go white-water rafting, if you’re a novice, your guide will spend some time teaching you how to sit in the boat, how to hold your paddle, how to adjust your centre of gravity, and where to plant your feet so that there’s less chance that you’ll get tossed out of the boat when you hit the rapids. Then, once you’re floating down the river, your guide will watch the river and warn you when the rapids are coming so that you have time to adjust your posture accordingly. An experienced guide will have been down that river many, many times, so they know how to navigate whatever’s coming. Read more...