Hydrodynamo Screw Attack Glitch
From M2K2: Metroid Prime 2 Wiki
Discovered by LeCoureur103
In Hydrodynamo Chamber there is a morph ball cannon that shoots you straight up, from underwater to the top of the room by the save point. If you Screw Attack directly onto the exit of the tube, it will open and you will fall straight down the tube. Once you have scanned the three switches and the floor raises, the morph ball cannon cannot be accessed; as you can only have the Screw Attack after raising the floor (and getting the Gravity Booster and so on), you will be stuck at the bottom of the tunnel until you reset your game if you perform this trick.
SOMEONE MAKE A VID PLEASE FOR THE LOVE OF GOD