From across the pond, in Bristol, we see where a young Outward Bounder on his first cave trip (Should that be "potholing trip?) got stuck between two large rocks, dubbed "Superman," so he tried getting out the way that was explained to him, and found he was really stuck big time. The rescuers chipped away on the rock and finally got him free, but believe he'll think twice about being Superman.
http://www.bristolpost.co.uk/news/local ... ves-288835
Putting one arm forward and dragging one arm, we found out many years ago, makes one able to get smaller by an inch so it's a good way in a tight spot.