Enemies Problem

Can you help me with this script it says i have Object reference not set to an instance of an object problem when im in the game and kill my enemy here's the code

 #pragma strict
 
 private var fall : boolean;
 var Player : GameObject;
 var spawnPoint : Transform;
 var stomp : boolean;
 
 function Update () {
     if(stomp){
         transform.position.z = 4;
         transform.localScale.y /= 2;
         fall = true;
         gameObject.GetComponent(PlatformMover).step = 0.0;
         stomp = false;
     }
     
     if(fall){
         transform.position.y -= 0.05;
     }
     
     if(transform.position.y < -25){
         Destroy(gameObject);
     }
 }
 
 function OnTriggerEnter(other : Collider){
     if(!stomp){
         if(other.tag == "Player"){
             Destroy(other.gameObject);
             var P : GameObject = Instantiate(Player, spawnPoint.position, Quaternion.identity);
             var sf = Camera.main.GetComponent(SmoothFollow2);
             sf.target = P.transform;
         }
     }
 }