I can vividly remember where I was and what I was doing when the airliners hit the world trade centre. It was a definite moment. Different generations had the same experience when England won the world cup, when president Kennedy was shot or when the Berlin wall fell.
Contrast this when the initial reports of Michael Jackson’s demise started to break. I didn’t have a definitive moment, since the source was online I had problems trying to verify the story, partly because of site problems with the source sites like TMZ and because of the slightly differing takes provided by the mainstream media. Watching the news has never been such hard work, I am not likely to know where I was when the next definitive moment happens because it is likely to take me a fair while to verify the event through multiple trusted sources.
Yang May Ooi documented her experience verifying the news here.