Misplaced apostrophes do that.

You’ll note I added a link to Lisa’s blog, it’s a marshmallow world. So go check it out.

When I wrote that sentence, I typoed “Lisa’s” into Lis’a, making it look as if I had linked to a blog written by a member of an interstellar army bent on the destruction of Earth and all of its inhabitants. “Followers of Lis’a, attack!”