To dream of hang gliding represents feelings about how easy it is to do something risky or dangerous all on your own.
Positively, may represents a refusal to held back because others think a situation is too dangerous or difficult. Alternatively, may reflect enjoyment of noticing how easy something others think is dangerous or risky is.
Negatively, may reflect scaring others or showing off with doing something perceived to be risky being too easy. It may also be a sign that you are taking too much of chance to do something by yourself. Thinking something risky or difficult is too easy.