You know when you leave something to download while you sleep, and Windows decides it's time to install some updates and reboots itself in the middle of the night, then when you wake up all excited about the thing that is surely finished downloading now and your hopes are crushed when you are greeted with a desktop with no open applications and you already know what has happened and just hope the download got pretty far before the reboot, and when you check it hasn't gotten past 10%?