Show how you get locked out when using current_user_can in a plugin that get's network activated.

lock-your-self-out.php

<?php
/*
* Plugin Name: Lock your self out
* Plugin URI: https://ngo-portal.org
* Description: Show how you get locked out when using current_user_can in a plugin that get's network activated.
* Just put this file in your plugins folder and go to plugins, network activate it, and you will get locked out.
* To get back in use ftp and rename this file (I use to add _ after filename like so lock-your-self-out.php_
* Reload your browser. Now your back in.
* Version: 0.0.1
* Author: George Bredberg
* Author URI: https://datagaraget.se
* License GPLv3
* License URI: http://www.gnu.org/licenses/gpl-3.0.html
*/

if(!function_exists('wp_get_current_user')) { require_once(ABSPATH . "wp-includes/pluggable.php"); }

// Down locks me out of admin area...
if (!(current_user_can('manage_options'))) {
	echo "<h1><center>Doing something here....</center></h1>";
}
?>