Another Gravity Question: Player suddenly flies upward

Questions & Answers
1

Edit: A new script was created to replace the Third Person controller, based off of the original controller. The player is not moving…

Edit: I found something out using the Lerpz Third Person Controller… The floating happens only after collision with the enemy. I ended up starting a game, colliding with the enemy several times, and then having the player float upward with all movements!

Gravity is giving me problems! I have the main character (“Player”) in my game. He normally does what he should do when I control him, but at random times, he quickly floats upward. He eventually falls back downward, but not after leaving the room I have made through the ceiling.
I have attached the Character Controller (from Unity) and a custom script for controlling the player. The code for the script is as follows:

    //Set variables!    
var runSpeed : float;    
var gravity : float = 20;
var addedGravity : float = 3;

var rotateSpeed : float;    
var speedSmoothing : float;
    
private var moveDirection : Vector3 = Vector3.zero;   
var verticalSpeed : float = 0;    
var moveSpeed : float = 0;
   
private var collisionFlags : CollisionFlags;    
private var lockCameraTimer : float = 0;    
private var movingBack : boolean = false;    
private var isMoving : boolean = false;
    

function Awake (){    
	moveDirection = transform.TransformDirection(Vector3.forward);    
}
                 

function UpdateSmoothedMovementDirection(){    
	var cameraTransform : Transform = Camera.main.transform;    
	var grounded = IsGrounded();        	    
	var forward = cameraTransform.TransformDirection(Vector3.forward);    
	forward.y = 0;    
	forward = forward.normalized;        	    
	var right : Vector3 = Vector3(forward.z,0,-forward.x);
    	    
	//Inputs    
	var v = Input.GetAxisRaw("Vertical");   
	var h = Input.GetAxisRaw("Horizontal");
    	   
	right = Vector3(forward.z, 0, -forward.x);    
	var left = -right;
    	    
	if(v< -0.2){    
		movingBack = true;   
	}   
	else{
  		movingBack = false;    
	}

	var wasMoving : boolean = isMoving;    
	isMoving = Mathf.Abs(h) > 0.1 || Mathf.Abs(v)>0.1;
   
	var targetDirection = h * right + v * left;
   
	if(grounded){  
		if (isMoving != wasMoving)   
			lockCameraTimer += Time.deltaTime;
   
		if (targetDirection != Vector3.zero){   
			moveDirection = Vector3.RotateTowards(moveDirection, targetDirection, rotateSpeed * Mathf.Deg2Rad * Time.deltaTime, 1000);  
			moveDirection = moveDirection.normalized;   
		}   
			var curSmooth = speedSmoothing * Time.deltaTime;    
			var targetSpeed = Mathf.Min(targetDirection.magnitude, 1.0);       			
			moveSpeed = Mathf.Lerp(moveSpeed, targetSpeed, curSmooth);    
	}	    
}
   
function Update(){

	//create variable for the controller  
	var controller : CharacterController;   
	controller = GetComponent(CharacterController);

//I know what to do here! Gravity!    
	moveDirection[1] -= gravity * Time.deltaTime;

	UpdateSmoothedMovementDirection();	

	var movement = moveDirection * moveSpeed; 
	movement *= Time.deltaTime;
   
	collisionFlags = controller.Move(movement);
   
	if(IsGrounded()){ 
			transform.rotation = Quaternion.LookRotation(moveDirection);  
	} 
    else{
  	moveDirection[1] -= gravity * Time.deltaTime * addedGravity;
    }
}   
    
function GetSpeed () { 
	return moveSpeed;
}
   
function IsGrounded () {
	return (collisionFlags & CollisionFlags.CollidedBelow) != 0;    
}    

function GetDirection () {    
	return moveDirection;    
}    

function IsMovingBackwards () {    
	return movingBack;    
}

function GetLockCameraTimer (){    
	return lockCameraTimer;   
}   

function IsMoving ()  : boolean {    
	return Mathf.Abs(Input.GetAxisRaw("Vertical")) + Mathf.Abs(Input.GetAxisRaw("Horizontal")) > 0.5;   
}
 
function Reset (){    
	gameObject.tag = "Player";    
}

@script RequireComponent(CharacterController)    
@script AddComponentMenu("Third Person Player/Main M Controller")

Does anyone have any suggestions on fixing this?

Edit: Here is the Player Damage script, which contains a collision event with the enemy.
private var canDamage : boolean = true;

public var invincibletime : float = 2.9;

function OnTriggerEnter(Enemy : Collider) { if(Enemy.gameObject.tag == “MarshmellowMan”)

{

if(canDamage)

{
   ApplyDamage();

}

else

{

   return;

}

}
}

function ApplyDamage() {


PlayerStat.health -= 1;

canDamage = false;
yield WaitForSeconds(invincibletime);

canDamage = true;
}
2

I have self taught myself, modeling, scripting, textureising, art and unity it self with no knowledge of any before starting, and i have always made it a rule of thumb whenever testing scripts and objects to do it in an empty scene and then save as prefab. This is so i can quickly rule out problems with my game. Obviously a lot of different things in your game will be checking other scripts so take them into the empty scene and test it with it.
For your problem it sounds if your arrow key is referenced possible in another script causing the character to jump in the air.

Check ur settings and try using a different key under a different name, i dont know the scripta ur using as i always custom wright my own to learn, even if im repeating a script