Do you know what happened to the Little Boy that knew How?

So, I was in the Port Authority Bus Terminal today and behind me I hear a little boy say, "I know how, mommy."
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Then I hear mom, "You know how?  Let me tell you about the little boy that knew how.  He told his mommy he knew how.  Then got his foot caught in the escalator.. and he died!"
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Wow, bad story.
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(And no Julie, I didn't tell him how he could stop the escalator if someone got stuck. :-).