Corrected entry: Fraser regales the platoon with a tale of how he inherited a deep sea diver's suit when the owner died of the bends, and later there is some concern that when Fraser uses the suit underwater he will get the bends if he surfaces too quickly. Deep sea divers don't get the bends; they breathe uncompressed surface air pumped into their helmets. They do not 'compress', do not need to 'decompress' and do not get the bends.
Correction:Absolute rubbish. It is physically impossible for a diver to be at any depth and NOT be breathing compressed air. Even if it is pumped down to the diver at surface pressure (unlikely for reasons too numerous to mention), the air in the divers lungs will sill be compressed, the nitrogen in the blood will still be compressed and this will require decompression stops on ascent.
Factual error: While Capt. Square is looking through his binoculars at what he thinks is Mainwaring's platoon marching with their rifles, a 1960's Bedford lorry drives past on the road behind them.
Question: A set of complicated events mean that Captain Mainwaring and some other members of the platoon have to drive a railway engine. After they leave the railway station it turns out that the railway engine has no brake wheel and cannot stop. The ARP warden, the mayor of Walmington, the vicar and verger take the brake wheel, jump on a handcar and chase after the engine. Catching up with the engine, they throw the brake wheel to Captain Mainwaring. The engine then reverses, so they must pedal the handcar even faster to avoid being run over. Could four men (all obviously in late middle age, and past peak fitness) pedal a handcar to outrun a railway engine at full steam? When the engine reverses, why do they pedal the handcar to stop being run over? Why don't they jump off the handcar, then pull the handcar off the track? (Also it takes the engine less than a minute to reverse. In reality, it would take several minutes to change a moving railway locomotive from forward to reverse).
Answer:The show is a comedy, this was played for comedic effect and to show that in times of extreme fear, in this case about to be crushed by a steam train, the men had an adrenaline surge strong enough to pedal fast enough.
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Correction: Absolute rubbish. It is physically impossible for a diver to be at any depth and NOT be breathing compressed air. Even if it is pumped down to the diver at surface pressure (unlikely for reasons too numerous to mention), the air in the divers lungs will sill be compressed, the nitrogen in the blood will still be compressed and this will require decompression stops on ascent.