Yeah my sister pushed for something like 6+ hours with her first birth. Tried all sorts of positions, finally added pitocin, nipple stim etc, and finally, 2 pulls with the vacuum got his head around. She had a natural vaginal birth (no pain meds, anyway), with major tearing, a UTI as a chaser, and was pretty wiped out. Everyone suspects that it was just malpositioning of baby's head that caused such a prolonged 2nd stage, but kudos to the hospital CNM who tried everything possible to give her a vaginal birth.
Baby #2 for my sister came out in 2 pushes on hands/knees, and afterwards she said, "wow that was so EASY!"