Ok I just read this one and the work guys keep trying to find out what I am laughing about - but I will never tell!

"
I flare my nostrils. Squint my eyes, furrow my brows, and lean forward, cocking my head slightly to the side. No matter what, I do NOT open my mouth, widen my throat, put my hand to my mouth, or even drop my jaw with lips shut tight. I’ve invented a displaced yawn that relies entirely on the nostrils and sinus cavities.
I hope that it looks like I’m trying to remember something just out of reach. Or am suddenly having an deep idea. More likely it looks like I am about to stroke-out. Inside my skull it feels like the deep intake of air might pop my eyes right out of my head (hence the squint). "

http://whatashrinkthinks.com/2011/10/23/yawn/