Here’s a great tip for anyone who is doing stand-up training From Learning TRENDS by Elliott Masie:

Wait Nine Seconds for Learners:
This is a simple and very powerful tip for trainers. After asking for questions from the class, silently count to nine. Only nine seconds of silence will increase the number of questions dramatically. It takes at least 2 seconds for the learners to recognize that you actually asked a question. And, a few seconds to rehearse their question and check the room for other hands. Most trainers only wait about three seconds and then announce, “Great!” That’s not great. If you taught really new and good stuff, there WILL be questions. Wait nine seconds. It may seem long to you, but it is a real gift to the learners.