The funny name for your friend's labor pattern was a Posterior Arrest. The mother is not a jail, however. Releasing the baby means releasing the mother, too. By this, I mean, that often tight or twist pelvic floor muscles can hold a baby back at 7-8 cm for many hours.
If we can do a technique to release the tension on those muscles, the baby may be able to either rotate to a better postion (anterior, with its smaller head circumference) or simply suddenly have room to come out
An inversion and a pelvic floor release are two things that can be tried. See About Spinning Babies for a free education on Posterior presentation or other tricky fetal positions.

It doesn't have to repeat. Second babies are worth it!