Always amazes me how long Freddy Curci held that note at the end. The man has lungs.

Was that all sustain or was that the keys finishing?

According to Guiness, it was all him for nearly 20 seconds.

There was no official video, so the one mrvmax posted was a live performance overdubbed with the studio version. His mouth movements didn't quite match the vocals, especially during the end. Clearly, such a feat was rarely repeatable live.

Some Bruce Dickinson lungs there.