Someone tell me there's a way to get it out of my face for longer than a few minutes.

well Lanz was looking for something a bit meatier. blame him

fuckin' Lanz

I refreshed and haven't seen it since.

I'd actually completely forgotten all about it before seeing this.

Courtesy of a friend: in custom css, add this line:
.impress { display: none !important; }

You may have to refresh twice to get it to work.