Why did this happen, it was so strange!?

Well, I was in my mum's car in the passenger seat, and it was really sunny, so I closed my eyes. You know when the sun shines through your eyelids and it looks kinda red and then when you pass shadows, still with your eyes closed, it flickers? Anyway, I was closing my eyes and I saw a kind of image; It was of and man shouting at another man and me standing behind him, looking scared. What does this mean?