Raycast Specific Object/Instantiate Explosion

Hello Again!

In my current(Unity 3.3 IOS)project I have a character walking across a bridge. If the character falls off the bridge he is to fall into a fiery river and explode. The problem is when he's on the bridge the Raycast reads the rigidbody on the bridge and he immediately explodes. If I reposition him in the scene window to an open air position, the gravity causes him to fall into the river and explode as planned. I added the following line of code to designate only destroy if the raycast hits the "plane". It doesn't work.

 if(hit.collider.gameObject.name == "plane");

The character does not get destroyed on the bridge or when he hits the plane/fiery river. There are several bridges and buildings he will be walking into, so I only want him to be destroyed/explode if the raycast hits the plane. Can anyone tell me why my code isn't working or how to correct it? Here is my complete Raycast code.

 var explosion: Transform;
 var point :Vector3;
 var explosionRotation :Quaternion;

 function Update(){
 
 var hit :RaycastHit;
 var dwn = transform.TransformDirection(Vector3.down);
 if (Physics.Raycast(this.transform.position,dwn,hit,3))
 if(hit.collider.gameObject.name == "plane")
 
 
 {
     point = hit.point;
     explosionRotation = Quaternion.FromToRotation(Vector3.up, hit.normal);
     Explode();
 }
 }

 function Explode()
 {
 
 Destroy(this.gameObject);
 var instanExplosion = Instantiate(explosion, point, explosionRotation);
 
 }    

Thanks for any advice and assistance in advance.

Respectfully,

Digital D