Screw Attack

Screw Attack is an upgrade in Metroid Prime 2: Echoes. It is obtained at Vault in Sanctuary Fortress.

What It Does
After jumping twice in mid-air, press the B button to jump further in an arc pattern. This can be done up to five times. Each Screw Attack will send Samus back to her initial height when she first activated Screw Attack.

Hitting a wall will cause the Screw Attack to cancel, and Samus to bounce back slightly.

Waiting too long to press B will prevent any further Screw Attacks. Pressing B too quickly will cause you to fall.

Screw Attack allows Samus to gain much greater horizontal distance than with Space Jump alone. Delaying each Screw Attack as long as possible will maximize horizontal distance.

Secret World Access
Numerous secret worlds can be accessed via Screw Attack. Most involve Screw Attacking at the right time so that you enter a morph ball tunnel. Nearly all morph ball tunnels can be used to access a secret world.

This is commonly used to quickly reach Torvus after collecting Seeker Missiles in Hall of Honored Dead.

Screw Attack Underwater
Activating this glitch requires morphing or beginning a screw attack just as you fall into water.

When active, you are able to screw attack underwater, underwater vision is not impaired, and you cannot use gravity boost.

Passing certain areas of underwater deactivate the glitch, such as the area above the door leading from Hydrodynamo Station to Hydrodynamo Shaft.

Uses include reaching the item in Torvus Lagoon without Gravity Boost, and reaching the portal in Hydrodynamo Shaft without Gravity Boost.

Without Space Jump
If you do not have space jump, pressing B will normally result in a cancelled (fizzled) Screw Attack. It can provide a slight bit of extra vertical and horizontal distance.

At certain areas of certain rooms, a normal Screw Attack can still be performed without Space Jump.