Two funny things to try

1. Catch a bee and store it in a bottle before you go fight Agahnim. During the fight with him, release the bee. It will buzz around him but do nothing, then when he vanished to move to another part of the screen the bee will go back to you, then when he reappears it will start buzzing around him again, and it'll go back and forth like that until you defeat Agahnim.

2. In the first Dark World dungeon (where you get the hammer), there is a room with a walkway at the top of the screen, and in the middle of the screen/room there is a large platform with 3 or 4 of the blue and red squids on it and one of those circular blue bumper things in the center. Stand on the walkway at the top of the screen, and stand at the spot with the arrow (where you can jump from the walkway onto the big platform below), but stay on the walkway. Wait for the squids to gather on the edge of the platform across from you, then place a bomb and throw it across the gap to the platform. It will land behind the squids and when it explodes the blast will push the squids towards you, and since they are all gathered right on the edge, they will all fall off at once.

It burns like a Glasgow bikini wax!