I'll comment on every released mobility style and physical status in the game. I wrote the multiplayer guide for Lost Planet: Extreme Condition and have a very solid understanding of game mechanics.
Physical Status
1. Stutter
Visual Description: The character model jerks to a standing position.
Primary cause: Machine gun fire, weak energy gun blasts
Alternate cause: Powerful single hits (rifle shots, long-range shotgun blasts)
Effects: The target freezes in place and loses the ability to fire for an extremely brief period of time. The machine gun can stunlock targets and disable them completely, although this is difficult.
2. Knockback
Visual Description: The character model takes a forced step backwards and arches its back.
Primary Cause: Non-lethal explosions
Alternate Cause: N/A
Effects: The target is forced into a more powerful version of stutter. They lose the ability to do anything until the animation is completed. They are rendered vulnerable throughout the animation, which lasts approximately three seconds.
3. Stumble
Visual Description: The target is sent stumbling in a fixed direction.
Primary Cause: Non-lethal explosions
Alternate Cause: N/A
Effects: Stumble is the mobile alternate to knockback. The character is forced to endur a slightly shorter animation (Approx: two seconds) and is unable to change direction mid-animation. They are rendered vulnerable throughout the animation.
4. Knockdown
Visual Description: The target is flipped onto their back.
Primary Cause: Shotgun blasts, explosions
Alternate Cause: Physical contact with vital suits and akrid
Effects: The character is knocked down. They are invulnerable to all forms of damage with exception to environmental effects (lava, great heights) but are unable to perform any actions until the lengthy animation has been completed (Approx: four seconds). This status sets them up for follow-up actions and is a severe disadvantage.
5. Freeze-lock
Visual Description: The target is rendered completely immobile despite its violent spasms
Primary Cause: Plasma grenades, EM laser
Alternate Cause: N/A
Effects: The character is locked into an upright position for around two seconds. While follow up attacks are difficult to initiate by the original combatant the target can be continuously stun-locked with electrical / laser attacks.
Mobility Styles
1. Standing: No advantage. Induction of status effects is exempt from stumble.
2. Crouching: Decreased hit box. Accuracy is more manageable. Grenades can be thrown more rapidly. Induction of status effects is exempt from stumble.
3. Walking: No advantage. Induction of status effects is unlimited.
4. Running: Higher mobility. Induction of status effects is unlimited.
5. Crouch walking: Decreased hit box. Slow, quiet, tactical movement. Accuracy is more manageable. Induction of status effects is unlimited.
6. Rolling: Decreased hit box. The first half of the animation provides immunity. The second half results in the character taking double damage. Accuracy is difficult to maintain. Induction of status effects is negated during the first half. Induction of status effects is unlimited during the second half.
7. Jumping: Increased mobility. Allows heavy weapons to be fired without remaining stationary. Disables the use of grenades and vital suit weapons. Induction of status effects is limited to knockdown.
8. Grapple suspension: Various uses. Induction of status effects is limited to knockdown.
9. Grapple pull: Increased vertical and horizontal mobility. Induction of status effects is limited to knockdown.
