Instructions
Jump into a pool of deep water and tap the "X" button to dive. Press "A" to start swimming slowly, or tap "X" to swim faster.
Tilt the right stick left or right to move the camera as you swim. Use the left stick to change the direction in which you are swimming.
Press the right stick up to zoom in on Banjo, or press down on the right stick to zoom the camera away from him.
Tap the "LB" or "RB" button quickly to center the camera directly behind you. If you hold either button, you make a sharp turn left or right.