Can someone tell me what it is like when you go through your episodes?

I really would like to know.

Do you think to much? What I mean is when you do stuff during the day it seems normal to you but when an episode hits, "if that is the right term" do you dwell on how your comments or actions could be taken another way, a negative way to others? I'm not talking about paranoia.

I have a friend who wont seek help but goes through things like that. He actually doesn't like being around people when he gets like that. I have no clue about Bi-Polar and he wont seek help....

Can anyone tell me what they feel like when an episode hits, not that your depressed but what goes on.

thanks