Re: Urban Legend
Thoroughly debunked in the Usenet newgroup alt.folklore.urban back in '97ish (I'd go check for the exact date, but the goo-tards destroyed DejaNews, unfortunately. Seems an ASCII archive is beyond their technical expertise.)
You can read the gist of the debunking at snopes.com ... note the date of the article.
For those of you who intelligently don't blindly click on links:
https://www.snopes.com/fact-check/the-obstinate-lighthouse/