Jamais Vu: The phenomenon of experiencing a situation that one recognizes in some fashion, but nonetheless seems very unfamiliar.
Presque Vu (Tip-of-the-tongue Phenomenon): The feeling that one can almost recall something but continues to be frustrated by elusive recall.
Flashbulb Memory:A highly detailed, exceptionally vivid 'snapshot' of the moment and circumstances in which surprising and consequential news was heard.