When Hannibal has Clarice against the fridge, he asks her where the key to the handcuffs is, when she does not tell Hannibal, he picks up a meat cleaver. You will notice the cleaver has celery pieces (I think) and water droplets on it. Although, about two seconds later, when he asks Clarice "Above or below the wrist." You will see that the celery is gone and the cleaver is completely dry.