4. Jean Van de Velde, the 1999 British Open
The choke: Rather than play safely after his drive drifted into the rough, Van de Velde went for the green with a 2-iron. His shot sailed right, hit a grandstand and ricocheted back into knee-high rough. Rather than play it safe, he aimed for the green again, only to hit his ball weakly into a creek. He ended up in a playoff, losing to Paul Lawrie of Scotland.