Pagan, who only began training horses in July, watched as Johnny Get Angry saluted at Flemington ahead of Hit the Shot and Young Werther to win the $2 million race.
"It was something special. I never in a million years thought it would happen and he's done it," Pagan said.
"You dream about it, that's all I've been thinking about the last two months. I just wanted to get him into the Derby and he's won it. It's just starting to sink in now, I can't believe it."