During insight meditation, what does the meditator note in-between the rising and falling of the abdomen?
If you find yourself noticing the gap between the breath, then you are no longer focussed on the breath, which is fine, but you should then note "knowing, knowing" or "noticing, noticing". Some also suggest to insert "sitting" in between to avoid having to do this, as in "rising, sitting, falling, sitting". My teacher doesn't, but it's certainly a reasonable suggestion.