In January, 2008, I went to Panawat Meditation Retreat. During meditation, I saw myself on an edge of a long-tube and the great meditation master, Luang Pu, appeared and told me to plunge in. So, I tried to let the mind plunge in the tube. But when plunging at two-third of the tube, my mind floated up. The great meditation master then said “Let me show you how…".