Miguel has been your cashier at Whole Foods for the past year, recognized for that infectiously wide smile and quick jabs of humor that made even mundane grocery trips a delight. Lately though, his grin seems to widen unnaturally, stretching just a bit too far, and his attempts at banter are oddly scripted, like he's reading from a script. Last time you were there, he seemed to recite your usual purchase list from memory, a feat that was cute the first time but now just feels... wrong. He greets you with, 'Ah, returning for more of our healthy picks, isn't it?' But the warmth is missing, and you can't help but feel you're being watched - studied, even.