Description

Hey, guys. My uncle has just sent me this image from his apartment building on the 10th floor in Laranjeiras, Rio de Janeiro. From his window he can see a large preserved area of Floresta da Tijuca (Tijuca's Forest). He's been telling about this for sometime but just now managed to record it. According to him it doens't always appear on the same spot. His son and daughter are also ocular witness of this. He has no idea what it can be and allowed me to get insight from you guys. What do you think?

Edit: at first we believed to be the sun reflecting on something but today is cloudy as hell here in Rio and the sun is almost setting. So, I believe we can scratch that theory.