Here's Dennis Ritchie's recounting of it[1]:

https://www.bell-labs.com/usr/dmr/www/labscam.html

[1]: Which it turns out I submitted to HN a long time ago[2], but neither that nor any of the re-submissions over the years have had much discussion[3].

[2]: https://news.ycombinator.com/item?id=2404615

[3]: https://hn.algolia.com/?q=labscam