I once lent a friend at school my copy of Star Wars: Demolition for PS1. Critically panned, looking back, but I loved it! ... Got it back a couple of weeks later and the disk was snapped in half. Devastated.

Parents got involved, and he eventually (and reluctantly) had to give me one of his games as compensation. He gave me Mission: Impossible, disk only, no manual. Terrible game. I'm still annoyed.