This is the sort of test that could be thrown at the volunteers during training, whilst under pressure. The lecture interrupted by an armed attack/explosion then asked to give a description of the incident/attacker. The agent being expected to think on their feet and remain calm under pressure. Mention is made by @Fibonarchie of the Boy Scouts. Many instructors and agents had a background in the Scouts. Such things as map reading, outdoor activities being second nature. How many have ever played Kims Game? Scouts were also very active in occupied Europe within the Resistance. An interesting book being ‘The Left Handshake’ covering the Scout movement between 1939 and 1945. A number of aspects of SOE training being found in todays SF Selection.