I’ll intellectually/emotionally/physically hard as answers. For me its either 12 hours straight “punching tubes” on a very large scotch marine firetube boiler at the beginning of my career or Easter around a decade ago when I was working with troubled teens and had to engage in 5 separate protective holds in one 16 hour double shift. The former was all physical and the latter was a combination of emotional and physical.
the day my work friend got so mad at me that he cut me off. to keep it short. there was a traumatic few weeks after that where he was taking out his anger on me.
Hostile work environments are so taxing, sorry you had to deal with that.