The Block had its second walk out this season last night when Kerrie and Spence, the most experienced team this year, decided to simply walk off their job site to discuss whether or not they were going to continue with the show.
They didn't really tell anyone that they had come to this decision, Donny, the team's carpenter, only found out about their situation when he decided to call them after producers of the show asked him where Spence was.
Norm said in a piece to camera later in the episode, that Spence had told him that he was ready to leave saying, "if you don't see us, don't be surprised."