TDD: Test-Driven Demo?

Perhaps preparation for a demo should be treated as preparing any kind of release for an Extreme Programming project...

• Prioritize the stories.
• Write the story tests.
• Break stories into tasks.
• Program test-first, writing the task tests and completing the tasks.
• Run the story tests as the tasks are completed.
• Any stories not completed by demo day will not be in the demo.
• The stories are prioritized up front but can change as marketing needs change before the demo day.

If the person doing the demo sticks to the script there should be a good chance the demo won't crash.