Foam UFO: Weird glittering floating mass caught on camera over Philly (VIDEO)
Hector Garcia says he caught the phenomenon on his cellphone on July 5, he told WTXF FOX 29 News.
"As soon as I started recording, it starts to move and come down," Garcia said. "As I zoomed in on it, it starts to swerve and starts going to the side, and I'm still looking at it and I don't know what it is. I was shocked."
The video, which may be a clever CGI hoax, has scored over a million views on YouTube.
Among the explanations of the strange view, a big plastic bag, soap suds or a really weird cloud were suggested.