 In nearly every scene Rustys in, hes eating something. According  to Brad Pitt (qv), this is because the whole gang (his character  in particular) would be so busy that theyd rarely be able to eat;  it was decided that Rusty would just eat all the time. He first  mentioned this when he was eating after having worked all day  without a break for lunch and was hungry, because he thought it  would be a good character trait for Rusty Ryan as well.