* I wanted an answer but wasn't going to ask because there'd be no response - then someone else asked and basically got no response

So I guess the answer is that Jack doesn't really want to talk about it

The theory is that people can basically use smart watches as lie detectors - but that would be an inaccurate method

The other idea is that it was insanely stressful and the heart rate going up was mentioned solely to demonstrate how uncomfortable things were and to Garner sympathy from the court