The actually page with this on it is availble here, along with how to use the Shinespark properly, and maps and images to pull this trick off. I'm trying to do this right now, and it's much harder than it seems. But I'm getting there little by little. You gotta have quick hands and be profeccient with the Shinespark.SPECIAL NAVIGATION ROOM EVENT
After defeating Nightmare and opening the level 4 (red) locks, you can experience a secret Nav Room event featuring Adam and the Federation officer. To do this, you'll need to use a complicated series of Shinespark tricks in Sector 4 to bypass the Data Room with the Diffusion Missile upgrade.
From the room where you opened the level 4 locks, head up the nearest long horizontal purple room and go through the ceiling into the green rooms on the map. Move to the part where the ground is suitable for running, then dash to the left and press down to charge your Shinespark as soon as you can. Quickly drop a Power Bomb and Shinespark to the right while it is exploding. You will hit the slope and start running. Immediately press down to charge and run back to the left and drop through the hole. The Power Bomb should have cleared out the enemies and opened the door in the room below.
In this room, do a horizontal Shinespark to the right and you'll hit the little slope in front of the door and continue running at full speed, right through the doorway. As soon as you get into the next room, hit down to charge your Shinespark again. Shoot open the red door on the right and go through it. When you appear on the other side of this door, drop down onto the lower "step" and do a horizontal Shinespark to the right. There is a hidden slope at the base of the yellow tube; you'll hit this and continue running. Before you get to the other side of the tube, hit down to charge the Shinespark again, then shoot the enemies, open the door and go through it.
Now this is where it starts to get difficult. You need to make your way up this zig-zagging room, blasting enemies and doing horizontal Shinesparks into each slope you see. Each time you Shinespark into a slope, hit down immediately to store your charge again, or you'll hit the wall and you'll have to start over from the beginning. And don't forget that touching an enemy will cancel your charge too, so make sure to blast the enemies as quickly as you can as you move upwards.
If you make it all the way to the top of this room with a charge ready, shoot open the left door and do a horizontal Shinespark to hit the slope below the door and run through it. As soon as you get to the other side, press down to charge the Shinespark for the last time, shoot down the enemies before they touch you, then do a spin jump to the left and shoot in mid-air to break out of the spin jump. From that point in mid-air, immediately Shinespark to the left. You'll break through that wall of Speed Booster blocks.
From here, it's a very simple matter of making it back up to the Navigation Room to view the event, thanks to the unlocked red door.
The event displays a dialog between the shadowy Federation officer and Adam the computer:
Adam:
Samus, I'm impressed that you were able to make it back.
That trick with the Shinespark was very...ingenious.
Federation Man:
That's our Samus Aran! Magnificent! Truly Magnificent!
As a reward, let's fill her in on our plan. Hmm, computer?
Adam:
That is...not advisable.
Federation Man:
Bah...
Adam:
No more joking.
Samus, get back on task.
Is your objective clear?
Yes
Adam:
I wonder how many players will see this message...?
You'll still have to go back for the Diffusion upgrade to continue the game. It's not a useful trick, just an easter egg for those of us who are willing to push the envelope. Good luck!
Good luck!
