Yes I just signed up to discuss this. It's kind of sequence breaking/early missile expansion section...when you get into the main area of the G.F.S. Valhalla (Repair Bay), take the right door downstairs and enter the room that leads to a missile expansion (Stairwell). To the right there are those weird rocks/piles of metal that can be melted by the plasma beam and above that is a ledge. I discovered you can spring-bsj up there and get across. If this is already known I apologize and if it is recorded on to metroid2002.com then I did not notice it. >_<
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