Following the experience, the user is left scarred as a memory of the event.

While at dConstruct 2010, I checked out 'Suspending Disbelief', an exhibition by Lighthouse featuring work by Julian Oliver, Caleb Larsen, Andrew Friend and Becca Gill & Jay Kerry.

My favourite was Andrew Friend's work. Not only because I have to have that underwater hiding place, but also because I found this very funny. Seeing it as a user story, what an acceptance criteria :)