Marth Tech: Short Hop
Description / How To Perform
If you press jump and release it quickly enough, you will do a Short Hop that is much lower than your full jump height.
Especially useful when combined with 
Fast Falling and aerial attacks, short hops are an essential technique in Melee.
Difficulty: 
(Basic)
Usefulness: (Essential Skill)
Extra Info
The length of time within which you must release the jump button to trigger a short hop is determined by the length of your characters jumpsquat animation. Marth's jumpsquat animation lasts 4 frames, giving you .067 seconds to release jump after initially pressing it.