Adding falling and landing animations to the Locomotion System

I would appreciate a little help adding a falling and landing animation to the JumpAndIdle script. I have added two public variables for the additional animations and I am modifying the sections commented "If character has landed" and "If character is falling". I have also changed some of the wrapmodes for the other animations and the scene I am using is the demo Crate Climb Scene.

I am trying to crossfade to the landing animation after the jump and falling states. At the moment it crossfades after a jump, but also whenever the character is grounded and not moving, which looks quite bad.

For the falling state I have a looping falling animation which I would like to crossfade to after the character has fallen for a certain period of time. For some reason it is never triggered, and only the jump animation plays the entire way down. Do the "Jump Time Start" and "Fall Time Threshold" parameters have something to do with this? I have both set to zero since I am not exactly sure what their function is. I cannot find any documentation or information detailing the function of these parameters either.

Here is my JumpAndIdle script:

 using UnityEngine;
 using System.Collections;
 
 [RequireComponent(typeof(AlignmentTracker))]
 public class JumpAndIdle : MonoBehaviour {
     
     public AnimationClip jumpingAnimation;
     public AnimationClip landingAnimation;
     public AnimationClip fallingAnimation;
     public float jumpTimeStart = 0.0f;
     public float fallTimeThreshold = 0.2f;
     public AnimationClip waitingAnimation;
     
     private bool doJumping = false;
     private bool doWaiting = false;
     
     //private LegAnimator legA;
     private AlignmentTracker align;
     private CharacterMotor cm;
     
     private bool grounded;
     private bool waiting = false;
     private float idleTimer = 0.0f;
     private float fallingTimer = 0.0f;
     
     // Use this for initialization
     void Start () {
         //legA = GetComponent(typeof(LegAnimator)) as LegAnimator;
         align = GetComponent(typeof(AlignmentTracker)) as AlignmentTracker;
         cm = GetComponent(typeof(CharacterMotor)) as CharacterMotor;
         grounded = false;
         
         // Only use jumping if the jumping animation has ben set
         if (jumpingAnimation!=null) {
             animation[jumpingAnimation.name].wrapMode = WrapMode.Once;
             doJumping = true;
         }
         
         // Only use idle animation if it has been set
         if (waitingAnimation!=null) {
             animation[waitingAnimation.name].wrapMode = WrapMode.ClampForever;
             doWaiting = true;
         }
         
         // Start with locomotion
         //animation.Play("locomotion");
     }
     
     void OnEnable () {
         if (animation["locomotion"]!=null) animation["locomotion"].weight = 1;
     }
     
     // Update is called once per frame
     void Update () {
         float speed = align.velocity.magnitude;
         
         // CrossFade quick to jumping animation while not grounded
         if (doJumping) {
             // If the jump button has been pressed
             if (cm.jumping) {
                 grounded = false;
                 waiting = false;
                 // Fade to jumping animation quickly
                 animation.CrossFade(jumpingAnimation.name, 0.1f);
                 animation[jumpingAnimation.name].time = jumpTimeStart;
                 animation[jumpingAnimation.name].wrapMode = WrapMode.Once;
             }
             // If the character has walked over a ledge and is now in air
             else if (grounded && !cm.grounded) {
                 grounded = false;
                 waiting = false;
             }
             // If the character has landed on the ground again
             else if (!grounded && cm.grounded) {
                 grounded = true;
                 waiting = false;
                 fallingTimer = 0;
                 animation.CrossFade(landingAnimation.name, 0.1f);
                 // Fade to locomotion motion group quickly
                 animation.CrossFadeQueued("locomotion", 0.1f);
             
             }
             // If the character is falling
             else if (!grounded && fallingTimer<fallTimeThreshold) {
                 fallingTimer += Time.deltaTime;
                 if (fallingTimer>=fallTimeThreshold) {
                     // Fade to jumping motion group slowly
                     animation.CrossFade(fallingAnimation.name, 0.2f);
                     animation[fallingAnimation.name].time = jumpTimeStart;
                     animation[fallingAnimation.name].wrapMode = WrapMode.Loop;
                 }
             }
         }
         
         // CrossFade to waiting animation when inactive for a little while
         if (doWaiting) {
             if (speed==0) {
                 idleTimer += Time.deltaTime;
                 if (idleTimer>3) {
                     // if the idle animation is not in the middle of playing
                     if (
                         animation[waitingAnimation.name].time==0
                         || animation[waitingAnimation.name].time>=animation[waitingAnimation.name].length
                     ) {
                         // Then rewind and play it
                         animation[waitingAnimation.name].time = 0;
                         animation.CrossFade(waitingAnimation.name);
                         animation[waitingAnimation.name].wrapMode = WrapMode.ClampForever;
                         waiting = true;
                     }
                     // Don't play again for a little random while
                     idleTimer = -(2+4*Random.value);
                 }
             }
             // If we have started to move again
             else if (speed>0 && waiting ) {
                 // Crossfade to locomotion
                 animation.CrossFade("locomotion");
                 waiting = false;
                 idleTimer = 0;
             }
         }
     }
     
 }

Would appreciate any help with what I am doing wrong, I'm sure it is something simple but I can't see it at the moment.