When Celestia offers to let Twilight rule Equestria for a month, Twilight panics. When Twilight panics, she starts throwing out really, really, stupid ideas. Unfortuantely for the three of them (and Equestria), Luna likes Twilight's very stupid idea.
Shining Armor has many secrets. The first is that he has a diary, that he lovingly calls his Shining's Logs. And the second is that he is a reincarnated human.