Stuff like that is frightening to me because they're known incidents. I wonder if there's a way to estimate the number of unknown ones.

> The lumberjacks were scavenging the forest for firewood, when they came across two metal cylinders melting snow within a one meter radius laying in the road. They picked up these objects to use as personal heaters, sleeping with their backs to them.

Sure. Free heater! That doesn’t look ominous at all.

But I guess that’s hindsight speaking. Because who’d expect two major radioactive sources to just be lying next to the road :/