I've been working on this puzzle myself, because stoppage happened to me in the middle of a meal of corn-on-the-cob.
The only thing I can think happened was that the stones I flushed out of my liver temporarily stopped the bile flow when they landed in my gallbladder.
There they stay, I think, though they feel less heavy now, since I've been working with the situation.
A little light massage got me a sharp twinge, then I stopped, immediately.
Slowly my BM's improved somewhat, but not 100%, yet.
And, I haven't even begun my Humaworm cleanse!
Just a thought. Andreas suggests that bile triggers perastaltis (waves of movement of the muscles of the intestines).