You're pretty upset. In fact, you're more than upset, you're outraged.
Every month it's the same. The new rota comes out and you're working every
weekend and every public holiday. People just push you around, and while
they're off playing golf or skydiving you're stuck here with the dregs of
humanity, and the patients.
This time you've had enough, and march into your boss's office brandishing the
rota. "Every weekend for the last 14 weeks! Why me? Why?"
Your boss, puzzled, replies "I don't know, you draw up the rota yourself,
you asked to be in charge of it."
"Oh yeah. I know. I like working weekends. Er - are those sirens I can hear?". Damn.