What would make me step off a building 93 floors from the ground? I am 44 years old, a business consultant and author and I like to think of myself as sane, but now I know the answer: Outward Bound. Nothing less than the chance to raise £1m to send kids from all over the UK to Outward Bound's six UK centres would do the trick; that much I know. And I have to hope that, come 3 September, it will be enough to give me the courage to step off the top of Europe's tallest building, London's newest skyscraper, the Shard. Why?