It shouldn't have triggered me, but it did.
I had to deal with a couple of antagonizing customers in a row, and I could feel my the muscles in my back tensing up and moving into my shoulders and up behind my right eye and despite my best intentions the headache refuses to go away.
Naps, food, water, meds, showers. Nothing is helping.
The headache's going to keep me up all night in it's nuclear awfulness until it decides itself to go away.