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These are pretty cool. They take events from the canon, then test them to see whether it would actually work in real life:
First up...Thor Bridge:
Then...the Engineer's Thumb:
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All I could think before watching was, "Boy, I wonder how they got volunteers for either one of those?"
Someone else may have posted a link, but these same contributors on YouTube have posted a recording of Conan Doyle himself speaking about the creation of Sherlock Holmes. Worth listening to.