Weigh-in Wednesday

I've been meaning to start answering the Weigh-in Wednesday questions for a while, so I figure this is a good time to start. This week, Carla (or Kristina, actually) asks:

Serving sizes vary so much from label to label. What food has a serving size that really surprises you, or what food really challenges you to stick with it's serving size?

Ben & Jerry's ice cream. I about fainted when I realized that the serving size was not actually the whole pint. :) I'm pretty good at staying within the 1/2 cup serving size, though--on the rare occasion that I bring the stuff into my house.