Elephants figure heavily in terms of memory.
“Memory like an elephant”
“Elephants in the room”
I was reminded of this by a friend dealing with dates embedded with ghostly elephants and as references do, it lead me here:
My oldest nephew always cuddled close during the heffalump sequence.
The interesting thing to me is how something as sturdy and true as an elephant acquired such worrisome emotional baggage.
Power of suggestion, I guess.
anniegirl1138 
I’m glad the Wiki article mentioned pink elephants, because whenever I conjure imaginary elephants, I always come up with a sequence that haunted my nightmares after I first saw it: http://www.youtube.com/watch?v=RJv2Mugm2RI
I almost put up the Dumbo pink elephants, but Pooh’s heffalumps held more personal meaning.