(in germany) Friend took multiple trains, Ubahn, Bus. 5 Seconds after leaving the bus, he realized he had forgotten his backpack with id, laptop, etc.

We were "hunting" busses for 2h but couldn't find it. He didn't have Find My set up on the mac. Filed police report etc. A week later he got mail saying the bag was found in a train in Augsburg. Which was the 2nd of 4 legs of the trips or something, and he was completely off where he lost it :D