historicalfirearms:

The Proper Way to Use the Fairbairn-Sykes Fighting Knife

Retired Trooper Stan W. Scott of 3 Commando discusses Close Quarters Combat with the Fairbairn-Sykes Fighting Knife. He explains the proper techniques for using the knife, which was specially designed for the Commandos by William Ewart Fairbairn and Eric Anthony Sykes in 1941.

this is really useful to me!  nobody ask why.  ~_~