This view is corroborated by Dr. Michael Breus, the self-dubbed “Sleep Doctorm” who told News.com.au, “One thing I tell my clients is that if you have a [U-shaped] neck pillow, turn it around so the bottom of the U is under your chin…because your head tends to bob, which will wake you up, and by rotating the pillow, it stops your head from bobbing.”
So, there. Please put this knowledge to good use on your next trip and see if a front-facing neck pillow lends better support to your gargantuan, lolling cranium. And by all means, if back-of-the-neck positioning works better for you, keep doing you. Failing either of those methods, you can always take more drastic measures.