public void crashShip()
{
if((Time.timeSinceLevelLoad - lastCrashed) < crashLimit) return;
gameManager = getGameManager();
Vector3 newPos = new Vector3(transform.position.x, 20, transform.position.z);
gameManager.decrementLives();
GameObject explosion = (GameObject) Instantiate(Resources.Load("Explosion"), newPos, transform.rotation);
if(gameManager.getCurrentLives() > 0) {
gameObject.transform.position = Vector3.zero;
gameObject.rigidbody.velocity = Vector3.zero;
lastCrashed = Time.timeSinceLevelLoad;
} else {
DestroyObject(this.gameObject);
}
}