But, I have a question: has someone actually watched the entire debate and looked for both the alleged hand signal and the lack of a signal?
Compare Holt's behavior with and without the alleged signal. If his subsequent actions are 100% correlated with the alleged signal, then you have something worth investigating.
Without it, you just have a coincidental nervous tic.
Don’t think the ill woman is that coordinated. It may just be a nervous action that is part of her illness.