For some reason, I was having trouble finding the inside end of my balls of yarn. The outside end was usually sitting there in plain sight, practically waving at me, so I would go ahead and knit with it. What a pain, every time I needed more yarn, I had to pick up the ball and unwind some before I could knit more. If I was careless and tugged without thinking, the ball would bounce from my chair arm and roll across the floor -- usually chased by a cat with evil intent.
I have seen cute little jars with holes in the top and pretty little bags to hold yarn balls, but they sure wouldn't work as intended if the ball had to roll around to release its yarn.
Then, I don't remember were, I read the term "Yarn Barf."
O frabjous day! It wasn't me, it was the way the balls and skeins were constructed!
So now I stuff my index finger right down the yarn's throat and make it cough up the yarn barf.
Sometimes it takes a whole lot more untangling than I would like, but it sure beats having a yarn ball bouncing and rolling and fighting the cats for it.
P.S. The link above is to Lewis Carroll's poem "Jabberwocky."