[mijoharas]

So, because it was a terminal, to exit it I automatically hit Ctrl+D, which bookmarked the page.

Well played Karlsteltenpohl, well played.

[ake1]

Less well played: Ctrl+w

Granted this does happen a lot on all other sites when typing but being in a terminal much instantly triggered it.

[nerdponx]

The Jupyter terminal actually does manage to hijack ctrl+w and ctrl+t, at least in IE Edge. Not sure how they manage it but it's kind of a nice touch.