Oh, the demo... its a quick informal thing... think of it as an opportunity to show off your prototype work. Just show what you have...
Oh, its now a formal demo... handful of customer reps... no big deal
Oh, its just three demos... And by the way, how much extra functionality can you add in 7 business days?
You know that feature your schedule says will take another 3 months to complete... can we have a prototype of that prototype for the demo?
Don't you just love things presented to you as an "opportunity"? It's a very, very scary word =) They often are "good" but the devil is in the details... Still, "opportunities" are much better than "risks"