[throwaway07Ju19]

I am not sure this is possible without extensive training. I once had a an assignment to meet with someone I had come to despise. But my face cringed just at the thought of sitting across from this person. So before the meeting I put a fake brace on my left arm and explained that if I look mad or frustrated it was because I am in physical pain. I was able to get through the interview and get information he might have withheld had he sensed I was hostile towards him.