The top part was spinning in circles. Unfortunately, I didn't have a camera with me.
I followed it -- it seems to be pretty close at first, but it gets further and further. By the time I took the Carmenita Road exit, I could still see it, but it appeared to be far away. It was hanging there for at least 7 minutes, and was on freeway 5 North at very busy hours.
I hope to find out what I saw today. If you have more information on it, please let me know.
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