Do we have to limit this to things we've done ourselves, or are (hypo)mania stories in general ok?
My first hospitalization, there were two guys who had met before but didn't know each other. It was only by coincidence that they met again.
Guy 1: Hey weren't you the guy scraping **** off the walls in clark county jail?
Guy 2: YEAH THAT WAS ME!!
The same guy later went into a massive rant during breakfast saying that pork meat doesn't need to be cooked because selective breeding has made it clean, then gleefully started informing us all about pork sushi.
As for myself, I thought my therapist in a mental hospital was an alternate version of myself from the future, and that some other kid who looked vaguely like Keanu Reeves was actually Neo, and I was Morpheus. That was before I decided he was Santa Claus.
Thankfully I don't really ever act out in a way that reflects my mental state. It's only until I start voluntarily revealing clues to my thought process that they see it. Although if I did lose control, I'd probably type a very long and seemingly insane essay on whatever had me excited at the time.