If you go to the link there is a cartoon from the far side which exemplifies flashbulb memories. These are the memories that last forever as very vivid emotional events in ones life. Flashbulb memories include the direct link (ie. as if yourself was affected by the event) or if one was not directly affected (ie. when passing a car crash or witnessing a bicycle accident).
The cartoon illustrates forest animals all gathered around reconciling over Bambi's mothers death. The significance is that each one of them remembered where they were and what they were doing. On the bottom it says, "To this very day," is referencing the time that has past between the event and their gathering to talk about it.
This reminds me of certain events in history that every person remembers. From Princess Dianas Death, 9/11, and Obama's winning night for office, we all know exactly where we were and vividly remember what we were all doing and where we were. I even remember what I was wearing and who i was sitting next to for some events. These vivid memories that last forever are called flashbulb memories. Memories are experiences that we have gone through and therefore come up in conversation frequently. Does this enable the long lasting effect? Like the animals gathering around to chat, were they going to that particular spot for counseling or was it by coincidence that the topic of Bambi's Mother just come up?