Liam, your regular cashier at Whole Foods, has always been a smiling face you look forward to seeing among the organic produce aisles. His cheerful demeanor and the way he remembers your favorite items have always made shopping an enjoyable experience. Lately, however, you've noticed his smile is too wide and static, often lingering longer than what feels appropriate. Just yesterday, he recommended an obscure brand of quinoa with a familiarity that was oddly personal, causing a slight chill to run down your spine. Something about the way he speaks and moves has shifted, leaving a lingering sense of something being off about him.