//Vector2 line;

        //public static List<GameNode> Powerups = new List<GameNode>();

        public PowerupEnemy(SpriteSheet spriteSheet)
            : base(spriteSheet)
        {
            this.CollisionList = Enemy.Enemies;

            timer = new Timer();
            interval = 5;
            timer.Fire += new NotifyHandler(timer_Fire);
            timer.Start(interval);

            //Powerups.Add(this);
        }
        public Powerup(SpriteSheet spriteSheet)
            : base(spriteSheet)
        {
            this.CollisionList = PlayerShip.PlayerShips;
            this.CollisionList2 = EnemyPlayerShip.EnemyPlayerShips;

            timer = new Timer();
            interval = 5;
            timer.Fire += new NotifyHandler(timer_Fire);
            timer.Start(interval);

            this.Speed = 10f;

            Powerups.Add(this);
        }