void DropCurrentPiece()
{
Destroy(_currentPiece.GetComponent <PieceBehavior> ());
_currentPiece.position = new Vector3(_currentPiece.position.x, _spawnYpos, 0);
_spawnYpos += 1;
cameraBehavior.OnPieceDropped();
// Chop our piece based on offset
if (_previousPiece != null)
{
ChopDroppedPiece();
}
// Spawn new piece, start over
SpawnNewPiece();
}