I just lost about two hours of gameplay time in Ocarina of Time. I loaded up my save from beating the first dungeon and wandered Hyrule Field, then went to Hyrule Castle Town, talked to all the NPCs, did the shooting gallery, went to the Temple of Time, talked to Zelda, went to Lon Lon ranch, Kakariko, learned the Sun's Song, got my second bottle and then went back to Kokiri Forest where I came to the two Skull Kids where I had to copy their songs. I got frustrated that I couldn't remember the whole thing to get the Heat Piece so I zipped back quick to get a pencil and paper with the controller still in my hand, my system shook slightly, and then my game froze.

....

I said I was going to wait to save until after I got Saria's Song...