My T always makes sure I know I can get away/out/leave if I ever need to. He has also been very honest that, at least with me, this is his greatest fear in working with me... that I will leave and not come back. I have never left early with him. I would have walked out on M T several times but she was usually my ride home and it was a 4 mike walk... yes ethics... but driving me home was the least of the evils.