I have been reading William Hart's Goenka book, and he keeps bringing up this weird ontology about "kalapas" as subatomic particles. What kind of experiences do kalapas correspond to in actual meditation practice?

I have been reading it because I'm going on a Goenka 10-day next month. Do kalapas come up in the course in any practical way?

Anything else worth reading beforehand? Or doing, apart from the obvious meditation?

Tj brocoli (done a bunch of Goenka retreats I believe) mentions kalapas here implying that they are mote conscious "particles" which arise and pass away instantly, forming all experience.

http://dharmaoverground.org/web/guest/discussion/-/message_boards/message/2325857#_19_message_2325857

Thanks for the pointer. That thread was useful.