Until now I’ve never actually had Google serve an error page to me. There have been times where I needed to reload Gmail or Google Plus, but today I saw a real error page delivered right to my browser by Google. It happened during a typical Google search and response was a 502, so I can only presume there was a problem with a back-end server that was grabbing my results. At first the instant search wasn’t working, then I was getting very limited results and finally I saw the pretty picture seen below. After about 15 seconds it was working completely normally again (that was fast Google!). Having been around so long and employing so many people I’m sure Google has some really great engineering going on to help with these sorts of failures. Cheers.