Did K said: "...there is an explosion, then you will ask a different question..."?

Many years ago, while volunteering at the Oak Grove School, around 1989, I was reading a K book, I think it was a public talk in some country in Europe, maybe in the 60’s. I am not sure.
At the end of the talk about “the observer is the observer, psychologically”, I remember reading something like that:
“…Then there is an explosion and you will ask a different question, and you are alone on it…”
I have not found it in www.jkrishnamurti.org.
Does anyone remember reading something like that? If so, in which book is it?
I would appreciate your help!
Thank you!