private static void AddShot(Vector2 location, Vector2 velocity, int frame)
{
Particle shot = new Particle(location, Texture, shotRectangle,
velocity, Vector2.Zero, 400f, 120, Color.White, Color.White);
shot.AddFrame(new Rectangle(shotRectangle.X + shotRectangle.Width,
shotRectangle.Y, shotRectangle.Width, shotRectangle.Height));
shot.Animate = false;
shot.Frame = frame;
shot.RotateTo(velocity);
Shots.Add(shot);
}