This dream may represent feelings of fear and vulnerability in your waking life. The family drive symbolizes a journey or path you are on with your loved ones, but the fact that they get out of the car and leave you behind suggests a sense of abandonment or being left behind. The handbrake not being on and the car rolling backwards into a quarry pit filled with water could symbolize a loss of control or feeling overwhelmed by emotions. The water represents the unconscious mind and the unknown, and the fact that you cannot swim suggests a fear of delving into your own emotions or facing your fears. The sinking car could symbolize a sinking feeling or being overwhelmed by these emotions. Your mother’s attempt to save you could represent a desire for comfort and support in dealing with these overwhelming feelings. Your father’s attempt to crack your back could symbolize a need for release or relief from the pressure and weight of these emotions. Overall, this dream may be a reflection of your fears and anxieties in your waking life and a reminder to confront and address them in order to find peace and resolution.