http://www.abc.net.au/science/articles/2012/09/04/3582324.htm
We keep coming back to the vagus nerve as an incredably important part of our anatomy to know well and understand how to interact with to keep us healthy.
Noticeably he didn’t try pressing on the point halfway between the belly button and the bottom of the sternum which is the one we use to ‘reset’ the vagus nerve. I’d try that.