Collider collides, triggers OnCollisionEnter, then bounces, before destroying itself

After posting this question, further research lead me to many questions about the same thing, but the one that clearly states my question is this, and as such, I will implement my own code to detect the collision before it happens... because OnCollisionEnter is called a frame later than it "should" be.

http://answers.unity3d.com/questions/320069/oncollisionenter-before-physic-simulations.html

EDIT: here's the code I implemented, basically a refactoring of the DontGoThroughThis.cs on the wiki.

//variables for raycasting in fixed updated private float minimumExtent; //private float partialExtent; private float sqrMinimumExtent; private Rigidbody myRigidbody;

 //optimized declarations for fixedupdate
 private float movementSqrMagnitude;
 private Vector3 movementNextStep;
 private float movementMagnitude;
 private RaycastHit hitInfo;
 Vector3 currentPosition = new Vector3();
 Vector3 newPosition = new Vector3();
 Vector3 nextPosition = new Vector3();
 
 //initialize values 
 void Awake() 
 { 
     myRigidbody = rigidbody; 
     minimumExtent = Mathf.Min(Mathf.Min(collider.bounds.extents.x, collider.bounds.extents.y), collider.bounds.extents.z); 
     //partialExtent = minimumExtent * (1.0f - skinWidth); 
     sqrMinimumExtent = minimumExtent * minimumExtent; 

     myRigidbody.velocity = transform.forward * SPEED;
     myRigidbody.angularVelocity = new Vector3(SPIN, SPIN, SPIN);
     
     Destroy(gameObject, timeToLive);
 } 

 void FixedUpdate() 
     { 
         //have we moved more than our minimum extent? 
         currentPosition = myRigidbody.position;
         newPosition.x = currentPosition.x + myRigidbody.velocity.x * Time.deltaTime;
         newPosition.y = currentPosition.y + myRigidbody.velocity.y * Time.deltaTime - 0.5f * -9.81f * Time.deltaTime * Time.deltaTime;
         newPosition.z = currentPosition.z + myRigidbody.velocity.z * Time.deltaTime;
         //newVelocity.y = oldVelocity.y - gravity * timeDelta;
         nextPosition.x = newPosition.x + myRigidbody.velocity.x * Time.deltaTime;
         nextPosition.y = newPosition.y + myRigidbody.velocity.y * Time.deltaTime - 0.5f * -9.81f * Time.deltaTime * Time.deltaTime;
         nextPosition.z = newPosition.z + myRigidbody.velocity.z * Time.deltaTime;
         //nextVelocity.y = newVelocity.y - gravity * timeDelta;
 
         movementNextStep = nextPosition - newPosition; 
         movementSqrMagnitude = (nextPosition - currentPosition).sqrMagnitude;
         
         if (movementSqrMagnitude > sqrMinimumExtent) 
         { 
             movementMagnitude = Mathf.Sqrt(movementSqrMagnitude); 
 
             //check for obstructions we will have hit
             //Debug.DrawLine (currentPosition, nextPosition);
             if (Physics.Raycast(currentPosition, movementNextStep, out hitInfo, movementMagnitude, layerMask.value)) {
                 CustomOnCollisionEnter(hitInfo.collider);
             }
         } 
     }
 
     //For visual affects only. Actual collisions are calculated on the server.
     void CustomOnCollisionEnter(Collider colliderInfo)
     {
         //Debug.Log ("CustomCollisionEnter hit at "+Time.time+" with"+colliderInfo.name);
         if (hitSplatter != null) {
             Instantiate (hitSplatter, transform.position, Quaternion.identity);
             Destroy (gameObject);
         }
     }