Captain Falcon (SSBM)/Down special
From SmashWiki, the Super Smash Bros. wiki
Known as Falcon Kick, Captain Falcon's down special involves Captain Falcon commencing a powerful, fiery kick that deals fire damage upon impact. On the ground, Captain Falcon moves in the direction he is facing, but in the air, Captain Falcon moves diagonally downward. The move has a 69 frame animation with hitboxes from frames 14-32. When used in the air, the user is able to use both jumps following the move even if they have already jumped while in the air. This is known as the double jump refresh.