That left parents to deal with children trapped in their seats. The show started rolling again with no warning while people were still returning to their seats, and after intermission there were jarring breaks in the storyline.
At one point an actress appeared to be speaking to an empty space where there probably should have been a dragon, Mr Doorley said.
"When I got home, I said to my wife 'I'm pretty sure they've cut out some of the show.' I got home, did some research and they'd cut out another flight scene.
"My son ... he said to me what happened to the bit where they go to the dragon island?"
YouTube footage proved the pair right, Mr Dooley said.
In fairness, he said the actors made a good go of a bad situation but it was frustrating that parents weren't told what was going on during intermission. He's emailed Ticketmaster for a refund - even a part refund.
"I think they should [refund] because we're paying a premium price for the show and we didn't get it. I know some people left the performance before it ended. I think it was badly handled to be honest."
Media spokeswoman Bridget de Launay and Ticketmaster did not return calls.