In the scenario you mentioned, it’s common for judges or coaches to express their initial doubts about a contestant’s ability, only to be pleasantly surprised when the contestant starts performing. The phrase “Simon calls her decision CRAZY” likely refers to one of the judges or coaches offering a critical or skeptical comment about the contestant’s choice or decision before the performance.
However, once the contestant begins singing and hits a remarkable or unexpected note, it can often “bring the house down,” meaning that the audience responds with enthusiastic applause, cheers, or other signs of approval. Such moments can be memorable and emotional, often resulting in a turnaround in the judges’ or coaches’ opinions.
This type of dramatic build-up and twist is a common formula in reality TV talent shows, making for compelling and entertaining television.
