To dream of being in this event is a feeling of not only a dramatic negative change in your life, but also to everyone around you as well as your envorment.
A very negative symbol and should be meditated upon.
To dream of witnessing this event is symbolic of feelings of helplessness in the face of a great tragedy. In prohetic dreams this heralds a great change in the distant future (planes are associated with great distance). This change may not be negative.... Encyclopedia of Dreams
Psychological / emotional perspective: A crash as in a collision suggests a traumatic occurrence, perhaps by not paying attention to detail. Crashing out would suggest losing a hold on reality.... Dream Meanings of Versatile
Dreams about being in a car or motorcycle crash mean your beliefs or lifestyle are clashing with someone else’s. It may also represent a recent shocking situation you were involved with. Dreams about airplane crashes mean you have set unrealistic goals for yourself.... My Dream Interpretation
Dreams of a rash represent that something is rubbing you the wrong way, and that you are going against the grain of your intuition and rhythm. This dream may also be showing you that you are embarrassed about the public revealing of something personal to you.... Strangest Dream Explanations
(Garbage) A trash collector in a dream represents a deprived person, someone who toils hard to serve others, or someone who struggles hard to comfort others.
A trash collector in a dream also represents a short lived richness, a short lived poverty, or a stingy person who keeps hoarding money. (Also see Garbage; Sanitation; Sweeping the floor; Trash)... Islamic Dream Interpretation