I've just gotten some milk for the station and chocolate (and some other, healthier foodstuffs) to see me through the night.
I've got to say, I love the way people doing their shopping stare as I walk past them in my uniform, clutching a shopping basket.
Not that I enjoy being the centre of attention, but the looks I get make me think that people are disappointed that us medical emergency types actually eat,
Try working a 12 hour shift without eating, and I think you'd find yourself a bit less able to deal with the stresses of the job.
A happy belly equals a happy EMT.