Trying to destroy a bullet but it freezes! (JS)

Hey there, I've been trying to create a projectile which gets destroyed after a set amount of time. The problem I'm having is that the bullet freezes when it should be destroyed. I'm using prefabs to create the instances.

Here is the code I used, I apologise if not all of it is relevant:

BulletMaker.js

 var bullet : Rigidbody;
 var speed : float = 500.0f;
 
 function Update () {
     if (Input.GetMouseButtonDown(0))    
     {
         var latestBullet = Instantiate(bullet, this.transform.position, transform.rotation);
         latestBullet.AddRelativeForce(Vector3.forward * speed);
         Destroy (latestBullet, 0.2f);
         Debug.Log("Destroy");
     }    
 }

Below is an image depicting what happens, though I understand that a still image doesn't really capture everything.