Why Not to Stare at Google During Updates

Ever wonder why so many "SEO Experts" and GoogleGuy himself, tells people not to look too closely at an update when its occurring? They almost compare it to looking straight at the sun, well, maybe not...

I was thinking about writing a long entry but I do not think I can convey what is going on in a thread at HighRankings Forum accurately. The thread name? Different Serps On Different Pcs With Same IP.