Great Demo! Resources

Have you ever been in a situation where:
a. You find yourself in front of an audience about which you know nothing of their needs or interests – and they’ve been promised a demo…
b. You are asked to join a web session, right now, and the sales person says, “They asked to see a demo…” (again, you have zero information about the customer)…
c. Someone walks up to you at a trade-show booth and says, “What do you guys do?” or “Show me a demo…”
Are you interested in a delightful self-rescue technique for situations like these?