This is Micah. He is using the Slump method. It's when you just relax where you're sitting and don't even bother with the head nods. It's a good way to prevent the Open Mouth side effect though you may have Stiff Neck syndrome later.
Holly used the I'm Going to Get Comfy and Sleep method. This method requires a pillow and whatever else you can put between you and the hard wall of the vehicle. This method does have its risks. Notice the slightly parted mouth but her neck muscles will probably remain unknotted.
Dave goes for the Relaxing at the Beach method. This requires a seat in front of you to either prop your legs against or over. The Slump and Slide move keeps you from the Open Mouth and Snoring risks. Although I could say he was snoring and he couldn't prove otherwise since he and all the other witnesses were sleeping at the time...
My Dad managed to pull off the I'm Really Awake but Resting my Eyes look. He was definitely out though. It's a good thing he didn't use the Head Back method; he would definitely have the Snoring effect and startle himself awake.
And since I'm a good sport... I took a picture of myself sleeping.
It took me a few tries since I couldn't stop laughing and then I woke up everyone else with my hysterics.
But I was determined. Pretty good, huh? It's the I Don't Have Anywhere to Lay my Head but Back method. Open Mouth is a given with this particular sleep position. Micah told me the only thing missing with my picture was some drool. I wish I had thought of that.
Or maybe I should be mad at Micah for insinuating that I drool...