LayZ boy is in a manic mood again

My brother LayZ boy is in a manic mood, yet again and it's not even Monday, so that he can excuse it on "Manic Monday-itis"!

He is in his bedroom, banging things really loudly, jumping up and down on the wooden floors, making a lot of noise!

And every time he leaves his room, he starts talking to himself as he runs down the hallway to get to the kitchen or he bangs the doors loudly as he opens and closes them to get outside to have a cigarette.

Neither of the parents are at home so he has no-one to talk to, no-one to ramble on his incoherent ramblings with, so he talks to himself and makes as much noise as he can because he needs to make himself be heard. Yet, I still ignore him, wherever I am (usually in my bedroom), but he still continues, probably because he has no ability to control his actions.

I do think he has manic depression (bipolar disorder), with his wild mood swings, manic behaviour, which is then coupled with his low mood and inability to talk much to anyone, cloistering himself in his room and ignoring even his bosom buddy, his equally deluded mother.

Update: Actually, after a full hour of his manic behaviour (banging things loudly, jumping up and down in his room, running up and down the hallways, talking to himself), LayZ boy has finally calmed down and is no longer in his manic mood. He's such a weirdo!