private int lookForNearbyHero(int uid, int dist) {
        /* Buscamos el mas cercano */
        ConcurrentHashMap<Integer,Actor> a = scenario.actores;
        Actor me = a.get(uid);
        for(Map.Entry m : a.entrySet()){
            if (((Actor)m.getValue()).health >0 && !((int)m.getKey()== uid) && ((Actor)m.getValue()).isHero() && isInRange(me,(Actor) m.getValue(),dist)){
                return (int)m.getKey();
            }
        }
        return -1;
    }