Does this look efficient, or is there a better way?

I wanted to have the fish in the fish demo start out with random directions... didn't like the look of them all starting facing the same way. So I added this function:

function FishClass::setDirection(%this)
{
   %this.direction = getRandom(0, 1);
   switch (%this.direction)
   {
      case 0:
         %this.direction = true;
         %this.speed = -%this.speed;
      case 1:
         %this.direction = false;
   }
}

and changed the OnLevelLoaded function call:

function FishClass::onLevelLoaded(%this, %scenegraph)
{
   %this.setSpeed();
   %this.setDirection();
   %this.setFlipX(%this.direction);
   %this.setLinearVelocityX(%this.speed);
}

I'm not sure how torquescript handles variables yet so I just used the pointer references.
Any suggestions?