At the end of season 5, when Angela was recovering from a slipped disc, the rest of the contestants pitched in to work on her room.
During Season 5, it became apparent that Matt was on a streak with passing the challenges and as a result, the show's crew pitched in to add a mohawk to his hardhat.
Really, the attitude of the experts and Andrew throughout the entire show could count when you look at it. They WANT the nominees to learn and succeed and will not hesitate to give them a hand in doing so. Their motto is also very much "if you screw up, but can at least acknowledge it, then you're doing much better than someone who screws up and doesn't acknowledge it."