I think you've seen Crazy Horse, a P-51 Mustang, here at the blog several times before. He seems to be a popular fixture on the Florida airshow circuit.
Back and forth he went, spending almost as much time upside down as he did right side up.
I think you can buy a ride in Crazy Horse. My birthday is in June, if anyone's taking the hint...
I didn't flip this picture over, I swear.