Dreams involving accidents, especially those that involve injury to others, can often reflect feelings of anxiety or fear regarding responsibility and the consequences of one's actions. In your dream, the older man and his son may symbolize authority figures or aspects of your own life where you feel a lack of control. The cyclist could represent vulnerability, possibly reflecting concerns for those around you or feelings of being overwhelmed by situations that seem unfair.

Your fear of the man retaliating for reporting the incident could indicate underlying feelings of guilt or fear of confrontation in your waking life. It may also reflect a concern about the repercussions of speaking out or taking action against wrongdoing.

Consider reflecting on whether there are situations in your life where you feel compelled to speak up but are afraid of the consequences. This dream may be urging you to confront those feelings and find a way to address them. It's important to assess how you can express your concerns or stand up for yourself or others in a safe and constructive manner.