2) This is a visual example of flashstepping, where it is moving hella fast (so outside of what a human could sensibly do). It's apparently innate since the Strider kids can do it as babies, including the ones who have no connection to the magical elements in the series, but it's never indicated to be magical or supernatural, just a thing. So I tend to read it as a physical thing for Striders that is just a Thing. But I could also understand it being read as not since no real-world human could do that.
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2) This is a visual example of flashstepping, where it is moving hella fast (so outside of what a human could sensibly do). It's apparently innate since the Strider kids can do it as babies, including the ones who have no connection to the magical elements in the series, but it's never indicated to be magical or supernatural, just a thing. So I tend to read it as a physical thing for Striders that is just a Thing. But I could also understand it being read as not since no real-world human could do that.