Mary and Jess watch eagerly as the customers nonchalantly approach the buffet table and select their food, bringing it back to their tables and eating as if nothing is wrong. How can they tell? It tastes fine. No funny smell, nothing out of the ordinary as far as they can tell.
And it doesn't seem to work, much to the girls' disappointment. Nobody looks quite piggish yet... they're about to leave in dishearted disappointment when they hear a sharp grunt from someone, then another...
And sly smirks cross their faces as they sit back to watch the mayhem.