EXCELLLENT site, vids, & photos! Thanks!
I've been on a couple different crash investigations...while skimming over the data & reports on the site - I understand what they are saying as far as debris hitting the ground with forward velocity that causes the debris to skip...
However on the crash investigations that I was part of...with that debris placement as well as other data gathered from subject aircraft history, wingmen, previous sorties & debriefs for the day - we were able to put together the scenarios prior to and the cause of the crashes.
A very interesting science indeed!