"His eyes were wide and his face flashed an expression of disbelief before conveying disappointment."
The expert also spotted a frosty atmosphere between Shirley and her fellow judges, adding: "You’ll notice that the other judges were critical of Shirley.
"Anton made a comment remarking that he felt like he was being criticised, with Shirley raising her hand to dismiss her co-judge.
"When Motsi made similar comments about the nature of Shirley’s feedback, Shirley never turned to look at her or move her body which subconsciously says, ‘I’m not going to acknowledge what you think’."
Strictly Come Dancing returns on Saturday at 6.40pm on BBC One.
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