Not my own experience, but...
A coworker was designing a site for a a bunch of jocks who run a sports bar. They continually called to complain that the site wasn't getting done fast enough, and continually ignored my coworker's requests for the content needed to complete it. The client asked why he hadn't inserted the image they'd sent a link to.
The link was to an animated gif of a stick figure walking across the screen and peeing.