Your colon is a very big tube in comparison to the bile ducts. Nothing coming from the bile ducts is big enough to get stuck in the colon.
Exercise, such as vigorous walking 30 minutes daily can do more to clean things out than all the colonics and flushes.
Just my opinion of course.
I'm not a Moritz fan but I believe he is referring to stones stuck in the bile outlets to the colon.
From experience I tell you that exercise will pop those rocks out before you are done with the 30 minute walk.