Staying in Bounds Question

I got this great question from Joseph. Though simple, it is a very rich thing to ask about the CI questioning process:

Hello Ben,

I am in Israel training a young lady in TPRS for Hebrew.  She is having trouble understanding what I mean by “staying in bounds”.  She has read your explanation in “Stepping Stones to Stories”.  Is there a video online that addresses this topic with examples of doing it correctly and also examples of violating it?  I am having trouble finding one.

Joseph Justiss