I'm not bipolar but recently I've had these bizarre mood swings that happen anywhere between a few days or a few hours. 

But two days ago I had something similar to a psychotic/manic breakdown. I was already doing mediocre all day but when I was walking from my last class to my university's medical center for severe teeth pains, I realized just when I arrived that I had forgotten my student medical card. On the way back to my dorm (it takes nearly 20 minutes to walk there, and 20 minutes back) and a sudden rainstorm came down HARD. Like cats &amp; dogs. Since I wasn't near a shelter my backpack got soaked and thus my expensive Dell XPS was Perma ruined. About 5 minutes from my dorm, I was drenched head-to-toe, my teeth killing me, and I lost it. I began smiling and shouting erratically, while cussing at no one in particular. My breakdown continued when I arrived at my dorm, even in front of my bewildered roommate. After showering I was much more calm.

This hasn't happened at this level before, do these happen to bipolar people?