Sometimes there is an explanation

http://googleblog.blogspot.com/2009/05/this-is-your-pilot-speaking-now-a...

But others look for a "deeper" explanation.

http://jerz.setonhill.edu/weblog/2009/05/google_outage_lesson_dont_get/

http://www.pcworld.com/businesscenter/article/138195/google_ibm_promote_...

But we have all had unexplained Internet slowdowns and it is hard to generalize from one incident.

Some incidents get reported but not explained.

http://www.pcmag.com/article2/0,2817,2341598,00.asp

Or explained somewhat weakly.

http://www.dslreports.com/shownews/Four-Hour-Google-Outage-Makes-Blogger...

http://www.pcworld.com/article/160153/gmail_outage_marks_sixth_downtime_...

Now that I have everything perfectly clear....