Crystal Flash

Crystal Flash
The Crystal Flash is a technique used in Super Metroid to regain health outside save stations or your ship.

It's performed by following these steps: This will result in Samus rising into the air in a ball of light, suitless, while her energy tanks rapidly refill.
 * Have 49 or less energy, nothing in your reserves, and at least 10 missiles, 10 Super Missiles, and 11 Power Bombs.
 * Morph into a ball
 * Hold down + aim up button + aim down button (usually L and R) + fire button until the Crystal Flash starts.