There are a number of voice interviews that follow on from the 'Credits' section. Fascinating.
I particularly like the second interview. Frightfully British voice, very plummy. This fellow is flying a Be2c and spots a German 2 seater below him. He dives towards it and his observer, an inexperienced Corporal, fires off the whole mag before the Be2c is even remotely in range. And in the usual understated way of the British, the pilot, now faced with an alert German whose observer is now firing at him, refers to his own observer as .....an idiot Corporal! Love it.