Thx for the info. I had heard the term se pasma la boca but being that it was in the campo and that they also say se le tuerce la boca I just assumed it must be espasmarse. Also, I have never heard anyone would die only that the mouth would go numb or twist or that one would go crazy. Finally, given that hundreds of millions Americans, Europeans and Asians aren't affected by the hot/cold issue (just look at professional sports or standard first aid for heat exhaustion) I expect the reason Dominican's are effected is merely suggestion.