Have you ever heard the expression: "You Bought The Sale Back"! ? This means that you have the potential customer ready to buy, get started or whatever the next step was going to be, but they didn't' take it. You were sure they were ready but you got the kiss of death phrase: Let me think about it.
It's because your presentation triggered their 'reluctant Hero', well maybe you didn't trigger it, it was inevitable according to Joseph Campbell's Hero Journey outline (Ep 680 if you want to listen). When they got to that point in the journey - they did exactly what they were supposed to do, and you were not ready! Hope you enjoy today's show.