if (strcmp(player->getName(), playername.c_str()) == 0) {
        player->knockback(direction, time_knockback);
    } else {
        GenericCAO *obj = m_env.getGenericCAO(id_player_knockback);
        if (obj == NULL) {
            std::cout << "OBJ NULL !!" << std::endl;
        } else {
            std::cout << "OBJ NON NULL !! " << std::endl;
            std::cout << "Joueur tapé : " << obj->getName() << " moi je suis : " << getPlayerName() << std::endl;
            obj->knockback(direction, time_knockback);
        }
    }