I recently finished "Please Explain by Karl Kruszelnicki"...The book had this catchy blurb on the cover page (not typing down verbatim): "Gift this book to someone who needs to refresh humankind's ability to make some sense of the world through science"....
Anyways...There's a chapter dedicated to "Yawning" (my 2nd article on Yawning) in this wondrous book...This Australian Scientist (Dr. Karl) says that (GENERALLY) if a medical patient "YAWNS" during recuperation period after the surgery, then it's a POSITIVE indication that the person is actually recovering well and good after the surgery...Which simply means that the surgery / treatment was effective enough!!!
Well...Applying the "Principle of Reversibility": What if next time when you visited any acquaintance (medical patient) of yours in a hospital : you started making use of above proposition? That is, since almost everybody knows that "Yawning" is quite CONTAGIOUS - why not just YAWN in front of the patient ?....If he / she yawns back after sometime, then maybe (EUREKA!) you have actually increased the probability of success of the operation that the patient must have undergone....Or maybe, you might just have helped the patient recover faster...
Howz that?
( :
