Helicopter 
Seeing a helicopter in a dream may indicate that you feel the need to be rescued, or in need of help to get away from a bad situation.
To ride in a helicopter in a dream shows that you have escaped a bad habit and made progress toward your goals.
Hearing the sound of a helicopter in your dream may be the sound of your beating heart, indicating intense emotions.
Feeling afraid while dreaming of riding in a helicopter represents insecurity with a high position in life. You may feel that you don't deserve that promotion, or that you won't be able to sustain a luxurious lifestyle.
Life Jacket
To dream that you are wearing a life jacket represents self-preservation. You crave support from those around you.
To dream that you are not wearing a life jacket indicates that you want to deal with your problems without getting too emotional, despite potential pain and anxiety.
Garage Sale
To dream of a garage sale indicates a sudden emotional clearing leading to a sense of clarity and freedom. To feel regretful about selling an object in your dream suggests that you may not be ready to completely heal from a recent emotional issue but that you will have the energy and the courage for a full healing in the near future.
Oxygen Mask
Wearing an oxygen mask in a dream indicates that you need protection from outside influence. You may be concerned that your environment is causing you pain.
Alternatively, an oxygen mask may symbolize a need for freedom. You need to get out of a stifling atmosphere and express yourself.
Hang Gliding
To dream of hang gliding indicates personal liberty and courage. Dreaming of hang gliding symbolizes belief in one's destiny. On the other hand, to dream that you crash a hang glider means a loss of faith and failure to commit.