It was his second score of the night which brought up the 100 and Dorn was delighted with the achievement.
"It was a very proud moment for me and a great personal achievement.
"Steve Magee - the best kit man in the world - informed me last week that two more tries and I'd be raising the bat; to use a cricket analogy.
"It was pretty special and with it being on television and everything it was awesome for all my friends and family who were watching and people back in Australia."
Despite finding himself out of the side for a large portion of the season, the former Salford and Castleford full back remained confident that he would re-find his form and is now looking forward to ending the season on a high.
"It's been tough at times but every sportsman has to go through adversity at some point. I was confident that I would get back in the side and prove to myself and everybody what I can do.
"We're starting to perform both individually and collectively. We may have left it late but that's the way it goes sometimes. All we can do know is finish the season strongly and then push on to next season."
Hit play below to see Dorn on his way to bringing up his 100th try for the Broncos.