Falcon Kick

Falcon Kick is one of Rufus's Unique Attack's in Street Fighter IV and Street Fighter X Tekken 

Description
An attack that can only be performed in the air. Rufus momentarily stalls his arial descent and changes his downward angle with a kick that remains active throughout the remaining time Rufus has in the air.

Tactics
Falcon Kick is considered the centerpoint of Rufus's gameplan. It can be used for the following purposes Rufus can take advantage of blocking opponents by using his above average damage throws. Characters without Reversals have less options to deal with Rufus's dive kick pressure
 * Change arial arc to avoid anti airs
 * Punish throw tech attempt
 * Use on wake up to punish Command and Regular attempts
 * Avoid and punish low normals
 * Descend from your jump much faster
 * Instant Air divekick to mixup your opponent
 * Cross Up the opponent

Comparisons to Jun and Yang.
Upon reveal Rufus was considered a replacement to the twins. Falcon Kick looked very similar to their Raigeki Shu in kicks that remain active throughout their whole usage, change arial trajectory, and stall in the air momentairly. There are some key differences between the dive kickers.
 * Falcon Kick does not have variations. It's activation is down forward MK. The twins have 3 different options with down forward LK MK or MK.
 * While Falcon Kick changes jump arc it only changes it one way. The twins dive kick have more options in terms of how vertical their dive kicks are.
 * Rufus can Falcon Kick off a backjump. However in this scenario he does not go vertical any way while the twins do not have a jump back dive kick option.
 * Rufus's dive kick does not have a height restriction (Note one was added in SFXT)

Trivia
This manuver shares the name of a much more famous version used by Captain Falcon in the "Smash" series