I've had lots of dreams about plane crashes - great big spectacular ones with huge jet airliners falling downwards into a massive explosion of bits flying everywhere, almost in slow motion. At first I took it literally, thinking that was my destiny, ie. that I was going to die in a plane crash. Then I took a more pragmatic approach and now assume it's a symbolisation of my personal fears of failure. I can see metaphorical symbolism in almost everything I dream and obsess about.