I do this.I was known to write 10 page essays the night before they were due. What else was I gonna be doing at 2am. Sometimes I love the pressure of getting something done at the very last minute. It is like a game. It makes something that isn't very challenging a bit funner.
I'm a perfectionist, so I will spend too much time researching information, and taking notes, then I have to shape all the notes into a cohesive, knowledgeable, fluid monologue, keeping within the guidelines, answering all the questions, and making sure a dummy could understand the subject. Then editing begins... :/