Karstan "let rip" on Dee as the pair blow up at Channel Nine's Melbourne Cup Eve party Karstan and wife Maxine at the Channel 9 Melbourne Cup Eve party. IT'S no secret that rival Blockheads Karstan and Dee were no fan of each other during their time on The Block, but their feuding has continued long after the show has finished. Making a show of their own at Channel Nine's Melbourne Cup Eve Party on Monday night, the pair "blew up" at each other during after Karstan "let rip" on his former rival, reports The Herald Sun. A source told The Herald Sun that Karstan "tore shreds" into a shocked Dee at the party in Eureka Tower, South Yarra as he shouted at her and asked "what are you even doing here?" Big Brother's Sandra Nixon and Deanne Jolly at the Channel 9 Melbourne Cup Eve party. "He just went mental in front of everyone, it was awful and we all felt really sorry for her," the source said. Fellow Blockhead Shannon reportedly agreed Karstan was "out of order" while Channel Nine confirmed the pair exchanged words but there was "nothing in it." An industry insider added that Max and Karstan went on the show to "get famous and never work again" and have been hitting the party scene hard ever since they finished up on the show. Wonder if Dee and Darren's rumoured return to the next series of The Block had something to do with it? Winner Simon and Shannon Vos (pictured centre) were also there. Originally published as Karstan and Dee's big "blow up" at Cup party