@CurbsideProphet he said exactly that, "dance for your mum" but as she was already looking/feeling fragile at being in the dance off it definitely did set her off.
She was very upset, had to sit down, Tess was comforting her. They took a break whilst she composed herself then they filmed again, and in the results show they spliced the two segments together to avoid showing her in such distress. I'm sure they edit like this all the time and I was pleased they cut it.
As I said up thread, I really admired her for carrying on and doing the dance off in those circumstances.
Gorka, on the other hand, I wasn't impressed with at all. He looked really annoyed at being in the dance off and seemed almost disconnected from Alexandra when she was so upset.
Overall it was really interesting to see how the professionals interacted with each other and with the audience during the recordings. Aljaz, Katya and Kevin were all lovely.