Yawning

 Yawning is a moderate problem. 

1. Sitting in my chair working on my laptop it causes the left arm to rise almost to my chest, threatening to dump the laptop onto the floor. I have to immediately grab the left arm with my right hand and very forecefully push it down. 

2. Driving a car I can't control it with my right hand so it wanders all over getting into trouble.
   

I've seen nothing anywhere on how to prevent this from happening.