I had no idea what this was, or why it might have been dangerous, so I tried it out.<p>I typed stream of consciousness stuff about not really being sure why I was typing for about two minutes, and then paused briefly.<p>I happened to spot the words fading away just as I resumed typing, so I typed some more about how I was curious about what happens when it fades all the way away.  Then I paused for a moment again to find out.<p>I found out.