This time I actually forgot it was my last time walking out until I was already in the hallway walking away. Then, I calmly walked to the lab management office and said to the lady who works there, "I'm not going to use this coat any more. Could you [i.e. the anatomy department] use it?" And I left it with her. (I had noticed recently that our professors use lab coats with unfamiliar names embroidered on them. Fun to think of who will use my lab coat, which has my name in sharpie on it.)
But now I think of the magnitude of things: unless I am invited to participate as a professor or physician (e.g. during our pelvis lab an OB/GYN was invited; during our leg lab a sports medicine doc came in), I will never legally reenter an anatomy lab.