Bipolarity as a lifestyle or the famous 180

Wikipedia says: Bipolar disorder or manic-depressive disorder, which is also referred to as bipolar affective disorder or manic depression, is a psychiatric diagnosis that describes a category of mood disorders defined by the presence of one or more episodes of abnormally elevated energy levels, cognition, and mood with or without one or more depressive episodes.

My own concept of bipolar desorder or bipolarity is a person that seems nice, you can even talk to him/her and hang out for a little bit and create an opinion about them being normal and nice human beings, until (wait for it!) the craziness surfaces in a way both dramatic and shocking that leaves you wondering for weeks if it was your imagination, (did you imagine the before or the after?).

Both woman and man seem to be embracing bipolarity as a lifestyle and get so into it that after the bad side appears and they behave "normally" again, they act like nothing happened and even ask you why you're acting so weird towards them (hhmm disrespecting me in the worst way a week ago might be the reason don't you think)

I will refer to two specific bipolarity episodes that happened recently, one to me and one to a close friend:

- "The girl that helped and rescue me to then insult me and make a list of all the things that are "wrong" with me": She helped me when I needed it, she invited me to her house, she was really nice. Until BAM! he screamed at me in public and then said I was crazy for feeling bad about it and BAM! she said various insults (one of them including the word "abortion", said I was insecure for not laughing about nasty comments in public and made a list of all the things I needed to improve, to finally act surprised when I deleted her from friends lists. Talk about Jenkyll and Mrs. Psycho.

- "The guy that said he was having a great time in 3 dates with my friend to then procede to break up dramatically, 3 times in a row through different social media or chat sites": He said he had a great time with herr, she went on a short vacation, on her way back she receives and essay listing the problems not only in his life, but in his friends' lives and a list of modified break-up lines like: "I want to make sure you know it has nothing to do with you, I have a lot of problems right now (it's not you, it's me)", "You're rad, you're a great girl, I want you to know that I still want to hang out (we can still be friends)".

After this 2 really good examples, I wonder: Are they really doing this things without noticing? Are they in denial? Is it really that they think that they're OK and the rest of the world is crazy?