I do this sort of thing a lot too when manic/hypomanic also. I write things and get the idea I will be a famous author or that it's of such importance, when really it's just rambling or pointless.

Other things I've done while manic: sent a letter to an old boss telling them how great they were just so they wouldn't have the FBI investigate me, I've planned and booked fancy vacations for myself and offered to pay for others to come along with me (but it all falls apart....and I really don't have the money for that), I laugh like crazy at nothing, I get mad at people who do not like my ideas, although my ideas are half-baked. I text people I should no longer get involved with, sometimes meeting with them and getting sexually involved with them.....the list goes on and on.