The Legend of Zelda: Ocarina of Time 3D Glitches

Get the Biggoron's sword without Trading!
What you need: Hover boots and fishing rod.

Directions: When you get the rod, go to the pond. Walk to the pond so that you are floating. While floating, cast B and the back flip almost the exact same time. You should be able to walk anywhere, even exit the place! (Note. This only works on 1.0 of Zelda OOT)
After that, leave the fishing area. Then, press start twice. Your rod should turn into a deku stick.
Now save and reset.
Once that happens, your 3rd sword slot (biggorn's sword/giant's knife) cannot be selected. Now go buy a giant's knife. You will get a biggorons sword instead!