today in the morning around 5:20am, I woke up and went to the backyard to smoke. suddently, a circular object which looks as big as my little finger shoots in the sky and vanishes immediately. it just happens for less than one second so I thought I saw a shooting star. however, I realized that it was day time and the sky was bright and there's no way I could see a shooting star in this condition. 20 minutes later I observed a plane flew at the same height, and realized that there's nothing we know today that can fly that fast.