My son's high school principal (big guy, over 6ft, weighed at least 250lbs) thought he could get loud with me, once. He thought he could use his size to back me up, once. Then looked astonished when I didn't move a muscle and just got louder (all 5'3" 130lbs of me). He retired the next year.
Incidentally, after I wrote a legalese letter threatening to sue, not just the school district, or the school, but everyone who had ever laid eyes on my son in their individual capacities, when my kid was in elementary and bullied & no one had stopped it. That principal retired the next year too. 🤗
My kind of parent. 💙
The legalese was really helped by years of working as a paralegal and the fact that I was in law school part time at that point. It was a scary letter that didn't directly ever even say I would sue, but implied it so heavily that it made it even more terrifying. All bullying ceased, the next day.