Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: Why the FUCK have i just saw a Game of Thrones spoiler on snapchat? SOME OF US HAVENT SAW IT YET 🖕🏻🖕🏻🖕🏻🖕🏻🖕🏻 #arsehole