The Legend of Zelda: The Wind Waker -
Before you begin, play the Wind's Requiem and blow the wind to the northwest. You want to run and jump off the platform, using your Deku Leaf to soar across the sea. Use the cyclones that are in the water to shoot yourself higher up. If Link can successfully make it to the distant flag, he will be rewarded with with a Piece of Heart #25. Don't mind the first cyclone as it is too close. The second cyclone is the one that matters most. You want to leap off the ledge just when that cyclone starts to move from left to right. Just hold straight and don't stray from left to right. Hitting the one cyclone should give Link enough momentum to make it across the flag.