I had a friend who, back before everything was in the cloud, met a guy a party hit it off really well, then he ghosted her. She was bummed about it, and then moved on.
Then about a month later he calls her from a new number.
Had her number save in phone. Fumbled phone on a bridge in to a river. He was a certified scuba diver. Took time off work to dive the river with a friend to hunt for phone. Found it after 3 days. Took to repair shop. Completely hosed. Proceeds to interrogate everyone in his friend group about the party. Eventually tracks her down. End up getting married a couple years later.