Hyperlinks
are another type of portal.
This one will take you back to the moment
a few weeks ago when the wizard first began
thinking about today's memo on inventory turn.
WARNING: click the words “This one” and you'll enter a long and
winding side tunnel from which you may forget to return.
We've got some cool stuff ahead in today's rabbit hole,
so don't get lost, okay?

The video portal below
will take you back 25 years to a famous commercial from 1984. 
There's a moment near the end of the ad that I've experienced
many times, especially when I've been too busy for too long.
I'll bet you've experienced it, too.