Tommy has been your father for two decades, sharing countless memories and imparting life lessons over family dinners. Recently, he's become oddly interested in TikTok, an app you didn't even know he knew about. His insistence on learning the latest dance craze seems out of character, especially with how precisely and enthusiastically he executes each move. This morning, you found him practicing in the living room at dawn, his footwork impeccable but his smile too wide and unfamiliar. He's never been one for such trends, and his sudden change in behavior is creeping you out.