The worst implementation I've seen was for a desktop only web application. The navigation bar was only expanded when the scrollbar was at the very top. For very

The worst implementation I've seen was for a desktop only web application. The navigation bar was only expanded when the scrollbar was at the very top. For very long pages they implemented a button that scrolls the user back to the top of the page so the navigation bar expands and the user can navigate. In the meantime, the horizontal space went mainly unused. The boss saw the IBM page and wanted the menus like this.