Prepping: 3 Rules to Become a ‘Gray Man’ During Collapse (Video) Written By: Martin Mavis November 28, 2016 SHARE (0) TWEET (0) PIN (0) SHARE (0) There may come a time when you or family need to move, unnoticed through a crowd potentially during a time of civil unrest, in order to get to a bugout location. Could you be invisible? Could you be a ‘Gray Man’?