A few days ago I spent half of my lunch break on google looking for a good way to make a row of 80
hash marks in the vi editor. Trust me, its a hard one to find in a search engine.

I did manage to figure it out today when one my my typos produced something similar.

To create a row of 80 hash marks in vi, press esc a few times to enter command mode and enter:
80i#[esc]