Well, Granny BB didn't really want to touch her chin to her nose, but her young grandkids were so deliciously grossed-out by it, that if there were enough of us spending the night with her, and we begged long and loudly enough, she would occasionally oblige at bedtime, when the teeth came out.

And no contortions are involved in simultaneously coughing and farting. It is simply what begins to happen more and more naturally after...say...age 50 or so.