Lindybeige on Youtube has some fun stuff on weapons and whatnot but here is a vid I love.
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A point about weapons in fantasy worlds.
The anecdote about the turtle does make the scenario seem a bit dull - with the PCs turned into mere spectators, but it wasn't as bad as it might sound. The players just heard a quick description of the army's methods, and were of course free to try to intervene (they didn't, much), and most of the scenario dealt with other things.
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Now I'm going to show it to the gun-bunny I play Pathfinder with.