Yawning is surely the work of the devil. I go through about two yawning fits a day. I think it is different because you really lack control over a yawn. You are at it's mercy, were the stretching excerices, your in control. I have been almost brought to my knees by a strong yawn.
Sneezing use to hurt my jaw/mouth area. Those parts must have healed as now a sneeze while standing just makes my back scream like the old days.
Amy