My little brother is seven and he has been acting super weird all day. He is usually very very calm and likes to be left alone usually but now he his like an attention junkie and is spazzing out a ton! He is seriously acting like a drunk person, I don't think he is, but he's falling down alot and laughing his head off at things that arent very funny. And usually he gets really mad when me and my sister accidentally mess with him in some way, but today he has never gotten mad or anything. Earlier today my sister accidentally hit him in the face with a ball and he just started laughing. Whats wrong!?