Might this be the summer you manage to jump into a pool from 3, 5 or 10 metres? Sure, it probably looks higher than you thought once you first climb the steps and walk out on the platform. But you can calm your nerves by remembering a few tips, courtesy of Matti Büchner, head of the water jumping department at a Berlin sports club and top athlete coach. The most important question first: How do I even dare? Matti Büchner: Sure, it’s quite a question of courage and it is perfectly normal to be a bit excited and nervous. You often see children, teenagers or adults in outdoor swimming pools brave…