The neuroscience quick take
Amygdala hijack means your rational brain goes offline for roughly 90 seconds under threat. Two slow breaths (in for 4, out for 6) buys you the window back.
Language that maintains authority
'I hear you. I still need you to leave the premises now.' Content acknowledged, position unchanged.
After the shift
Verbal abuse accumulates. A five-minute post-shift decompression with a trusted colleague or through a proper Employee Assistance Programme keeps small stress from becoming operational fatigue.