var    _audio : AudioClip;
var    _flyingShardForce : float = 1500.0;
var    _radius : float = 2.0;

function Awake () {
  _shards = gameObject.FindGameObjectsWithTag ( "Shard" );
}

function BreakMe ( ht:RaycastHit ) {
  var hitPt:Vector3 = ht.point;
  var shard:Transform = ht.transform;
  Debug.Log( "Hit shard! " + shard.name );
  if (!shard.rigidbody) {
   shard.gameObject.AddComponent ( "Rigidbody" );
  }
  var explosionPos:Vector3 = shard.position;
  var colliders:Collider[] = Physics.OverlapSphere (explosionPos, _radius);
  for (var hit : Collider in colliders) {
         if (!hit) continue;
   if (hit.transform.tag == "Shard") {
    if ( hit.rigidbody ) {
     hit.rigidbody.AddExplosionForce( _flyingShardForce, explosionPos, _radius, 3.0 );
    } else {
     hit.gameObject.AddComponent ( "Rigidbody" );
     hit.rigidbody.AddExplosionForce( _flyingShardForce, explosionPos, _radius, 3.0 );
    }
   }
     }
  if (_audio && audio) {
   audio.clip = _audio;
   audio.Play();
  }
}

shard.gameObject.AddComponent ( "Rigidbody" );