I just saw this story today on Borderland Beat. I haven't re-read all the posts so maybe this is old news, but maybe not. It is a story of two Gringo dual sport riders in Copper Canyon area meeting up with a group of drunken Scarios.
"I have approximate answers and possible beliefs and different degrees of certainty about different things, but I am not absolutely sure about anything." Richard Feynman, CalTec Scientist, Challenger Disaster Committee member.