Task Design - Paper Prototyping: The Fast and Easy Way to Define and Refine User Interfaces - page 108

usability study with college-level English teachers. (The joke, in case you didn't catch it, is that the
second sentence contains a comma splice. To an English teacher, this is funny.) I've also seen
developers draw elaborate hourglass cursors to use when the Computer needs time to find the next
screen—these can make users smile. Props, such as the one shown in Figure 6.4 , can also be
humorous. But the bottom line for humor is to carefully consider its effect on your users and err on the
conservative side.
Figure 6.4: We didn't really need this paper "credit card" for the e-commerce site we were testing,
but it made people laugh.