From the game Super Mario Sunshine for the Nintendo Gamecube
Go to the market where the durians are, and kick one in the general direction of the police station. Now, at the part where the police station and homes meet, you should see a deep corner. Kick or water the durian so that it goes into the corner. Now jump on it, and make sure it doesn't move. At the third jump, you should start hearing a wave noise for no reason.
Submitted by: Thor