I think it was a combination of his voice and the short films, but I voted for the short films. I was 10 years old when I by chance saw the Earth Song short film on TV and I couldn't tear my eyes away from the TV screen. It was quite strange actually, because before that moment I had always disliked music videos because I thought that they were just meaningless collages of images (Yeah, I was 10!). But Earth Song was something completely different and it really opened my eyes to the suffering of this planet. And I remember that the melody of the song was stuck in my head for a long time after that, until I finally saw the song performed live two years later.