Got an email from customer' tech asking me to review the logs and see if there was a problem on our end during a given period. So, I check, which takes an hour or so of poking around in various log tables on various running instances, and then start drafting email to say basically "no, doesn't look like it's us", but I get to the point where I would post "here's the log" and actually look at what I'd be asking him to look at.