: Psha, I knew that. Still, that cave at the end on TC = wow.
You want wow? Here's wow - Hit the switch to flood the cave, race up the 'alternate' exit (the one with the stairway leading to a ledge) and deal with the fusion bobs at the top. Jump down, recharge your shields to 2X (and save your game), then rocket your way back to the starting point, which is filled with fusion bobs, and you have almost no shields left. Deal with all those bobs, and now the real fun begins. Recharge shields to 3X, drop down into the lava, heading back into the cave and head straight for that side room (you did clear out the simulcrums before, didn't you?), up the secret elevator and get to the top with just the slimmest margin of shields left. Now grab one of the invincibilities and either rocket back to the top or leave by the terminal in the building with 4 doors (depending on whether or not you think 3x vs 2X shields are worth a rocket pack). Why in the world would you do all of this? Because you can ;^D