DS2 kept putting his hand up to his cheek during labor, which we'd discover after the labor would fizzle out. My midwife would feel and "darn thing put his hand up there again!" He did finally pull it down and I didn't have to deliver a nuchal hand, but it did happen four or five times over a three day period.
My first labor went much the same way, but I had crappy OBs who didn't really feel to see why labor was stopping. They just did the old standard "more pitocin" route. He was eventually born via c-section, but all I know was that he was posterior, not if he had a hand by his cheek.
Funny though... DS2 was born with indents on his cheeks from where he had his hand pressed against his face for so long. He still sleeps that way. It's cute.