Got this  from fulltime RV friends in Arizona...they said  the women in the motorhome  had been up out of her seat JUST 10 seconds before the accident  happened...thank God she was  buckled  in and back sitting down before this happened. Do not  know the facts as they are  just heresay.
 
Whenever we need anything from now on....we will wait until we can safely pull off and stop before I go wondering around  as you  just never know...guess you just  think  this could  never happen to you!

Thankfully they are  ok.

http://www.azcentral.com/news/articles/2010/02/04/20100204abrk-interstate10-crash.html