Screw Attack (move)

Screw Attack is 's up special move in Super Smash Flash 2. Samus spins around like a wheel, which causes her to gain altitude, which deals electric damage on contact. If used on ground, Samus will leap up at a fixed altitude, dragging along and dealing 11% damage to the opponents that touches her during the leap. It also appeared in Super Smash Flash as Samus' jump which could, like the Sonic characters' jumps, deal damage.

Origin
The Screw Attack in an upgrade that Samus collects in nearly every game in the Metroid series, starting with the original Metroid. It is usually one of the last special abilities Samus can learn. It constantly damages enemies during any spinning jump, dealing such massive damage it kills/destroys almost everything in its path on contact, as well as protecting her from all but the strongest attacks. It also continues to be active while she falls in the spinning motion.