These men, are extremely physically fit, and go forward, the whole way, with a panic strap attached. My friend's son was a green beret and I can see him doing this w/o any problem during his military career. I just do not see SM as a fit enough individual to make it forward, pushing a 22 # bundle in front of him, let alone trying to back his way out of there. Btw, I had to take a lil break 1/2 through, when the dude kinda struggled at one point...it kicked my claustrophobia kicked in! No worries about me hiding anything in a culvert.