Look at the Size of those Marines...It looks like if they did survive they would take turns. You had to be Thin to move about in those Tunnels and Caves. If you haven't read this book this a GREAT read worth the time. Maybe some or all of you have, but if you haven't look it over there is a great section about Tunnel Warfare and other Fascinating Facts with some Nice pictures of WW2.

Battle Stories The WWII 3-Book Bundle: El Alamein 1942 / Arnhem 1944 ... - Google Books