Yeah, my uncle actually told me about this legend. I thought he was joking, but he assured me it was true!
Really, in pakistan u don't know what they really put in the food. A few months ago in pakistan we all noticed that as soon as we had consumed no more than 3 mouthfuls of the food, we were really full up, couldnt eat more. This applied mainly to the bbq'd stuff. I really think they put something in the masala to make people not want to eat anymore bbq!
Was it at some relative's house who didn't want you to be there? lol otherwise this is anti-business tactic...