What do you guys think of UFO's?

[Your Computer]

I've seen an aircraft that i would not claim any human would design it, but i recognize also that doesn't mean aliens from outer space were flying it. But who would create an aircraft triangular in shape, perfectly camoflauged by the night sky, that generates no noticable sound, with three giant lights (i.e. taking up about 25% to 30% of space each) on the bottom of the aircraft?