Mercury 
To see Mercury in your dream represents endurance, persistence, practicality, and rationalism. It also implies that you are working to your full potential.
Vehicle
To ride in a vehicle in a dream represents your life's speed and direction. Refer to particular vehicles for more detail.
The driver of a vehicle in a dream represents the person, or the aspect of yourself, or a part of your life, which is in control of your life's path. For example, to dream that your boss is driving you around indicates that your work has become the main factor in your life decisions.
To dream of falling from a vehicle indicates that you feel out of control.
To dream of crashing a vehicle represents a self-destructive action.
Triangle
To dream of triangles signifies your goals, potential, and truth. It is also a symbol of spirituality and oneness of mind, body, and spirit. On one hand, it may also refer to a love relationship you have with two other people in your waking life.
Airplane
To see an airplane in your dream signifies your ability to solve problems, conquer hardships, and elevate yourself to a higher position of importance.
To dream that you transfer planes represents a significant change that is happening to you or will happen in the future. This alteration will lead you towards different objectives and goals than you were previously aiming for. You will receive respect and importance.
To dream that a plane crashes indicates that you need to reassess your strategies in order to achieve your objectives. Your current methods are not proving successful. Your targets are unrealistic and unattainable. In addition, the crashing airplane may reflect doubt that you will be able to reach your ambitions. You are hesitant and unsure of your ability to achieve success.
To dream that an airplane is hijacked indicates that bothersome emotions still linger from your childhood, youth, or earlier years.
Collapse
To dream that you collapse implies that you are setting too high standards and expectations for yourself. You need to reevaluate your objectives to make sure that they are still valid. Perhaps you have lost confidence in your choices, opinions, and beliefs. .
Outbreak
To dream about an outbreak suggests that you feel overrun by stress. One small problem has spread all over your life.
Air Show
To dream of seeing the air show indicates that a risk you have taken in the past is now finally starting to pay off. It's a good omen which implies that you're on your way in achieving your goals thus you want others be known about it.
Ambulance
This dream may also represent your concerns regarding your well-being, or it may mean that you have become afflicted with an illness or injury. In addition, you should take great pains to evaluate an important aspect in your life.
To see an ambulance full of wounded passengers denotes your apprehension of discarding previous beliefs and feelings and replacing them with alternate ones. You are influencing others with your negative thoughts and emotions. In addition, it could indicate that you should reassess your choice of acquaintances. They may be affecting you in a negative way.
To dream that someone is hit by an ambulance suggests that you are carrying emotional wounds that need to be healed.
Apartment
To dream about an apartment represents your current position of monetary well-being. To dream of a large, lavish apartment implies that an aspect of your life will substantially increase in value. To dream of a shabby and dark apartment signifies that you may experience a run of bad luck or may lose something of great importance and value.