Floating Ferris Wheel in the Sky

I have not seen this but my husband has told me this story many times. Now my husband is a big skeptic but he has yet to figure out this one. He doesn't know what to think about it. Here it goes...He was riding in a car with his ex girlfriend and they were passing by a cemetery and his ex gasped and he looked out her window and saw what he describes as a "Ferris-wheel" hovering in the cemetery, not quite in the sky but in mid air, and then he looked at his ex and looked out the back window and all of a sudden it was gone. Now he is very honest and I've heard this story many times. I was just wondering if anyone else has seen something like this. BTW he knows it wasn't a firework cause there were no noises and it was too low to the ground and it looked "solid" Plus, it was hovering there long enough for him to stare it down.