I came across this interview with Trooper Stan W Scott, No. 3 Army Commando, in which he demonstrates the proper use of a Fairbairn-Sykes Fighting Knife. He was giving a lecture at the National Army Museum in London in connection with a 2011-2012 exhibition. The exhibition was entitled “Draw Your Weapons: The Art of Commando Comics”. Commando Comics are a military oriented series of comic books dating from the 1960s that are still being published in the UK.
These old WWII veterans fought in a brutal war where both strength and cunning were prized. It shows in his demonstration on how to fight with a knife.