Open the grotto behind the Hyrule castle's inner gate (next to the tree) by playing the Song of Storms. Enter it and open the bombable wall with the gold skultulla behind it. Kill the gold skulltula and Z-target it (L-target if on the Gamecube version).Move infront of the pedestal that sends you out and throw your boomerang at it. While the boomerang returns to you, backflip onto the pedestal while it is about half-way to you. When you begin to exit the dialog box should begin to appear and may have a few words in it. If you exit the cave before the dialog box fills, and after you have caught the boomerang. you have completed the trick succesfully. Look on your Quest Status Sub-Screen and see that your gold skulltula count has gone up by one, but if you go back into the grotto the gold skulltula will appear there. Allowing you to utilize this trick as much as you like.Note: Do NOT let your gold skulltula coiunt go above 255 because this will cause the game to crash.