Unusual stories...funny, weird, bad - whatever. I'll start:
Recruited to visitation weekend at my top choice university. Current students don't have good things to say about my POI (e.g. "POI is mean/distant/creepy/difficult," "POIs last two students left the university," "current student is miserable," "POI can't keep students in their lab," "think hard about your decision to accept the offer"). POI weirds me out when I meet them in-person - commented on my (attractive) physical appearance, talked about former partners, cost of their house, criminal records of other applicants. I knew I'd reject the offer, even if I didn't get in elsewhere. After I told my advisor & other LOR profs about the weekend, they encouraged me not to take the offer, despite not getting in elsewhere.