Most likely related to the OSX issue described here recently: https://github.com/HackerNews/HN/issues/19
Confirmed both on Chrome and Safari. Chrome's console even crashes if you try to "View Source"
It doesn't crash on Chromium, Firefox on Archlinux and Ubuntu.
It should be noted that this isn't an official NSA account
Most likely related to the OSX issue described here recently: https://github.com/HackerNews/HN/issues/19