In the Shipyard in The Legend of Zelda: Skyward Sword, after defeating the Thousand Year spider thing and searching through the sand, Fi told me that there was a 0% chance there would be any clues in the sand and I should leave the area. But my intuition tells me there is a 75% chance that the great Level Designer Gods hid some special treasure for me here, like a Piece of Heart or a Gold Rupee or something... and Fi is just trying to divert my attention back to the actual plot. BORING!
Should I keep searching through the sand in this location? Is there anything useful to be found?
(If there is and you tell me, please use a spoiler tag for what the actual treasure is)