The young man, who was from a tribe with next to no knowledge of the outside world, approached a village in Brazil.
It's difficult to imagine in this day and age that there could still be communities of people who are so cut off from the outside world that they know almost nothing about what lies beyond their borders.
Nonetheless, such communities can still be found in the remote regions of the Amazon rainforest.
Just this week, villagers in Bela Rosa, Brazil, were shocked when a man from such a tribe suddenly turned up at their community after dark and started speaking to them in an unknown language.
The man was quite young and was wielding two wooden sticks that he gestured in such a way so as to communicate that he was looking for fire.
One of the locals tried, unsuccessfully, to demonstrate how a lighter worked.
When officials arrived, they escorted the man to a nearby facility for a medical evaluation.
It is understood that efforts will be made to ask the nearby Juma tribe - whose original population consists now of only three women - to try to communicate with him.
It isn't currently clear how far he'd come or how many of his own tribe remained in the rainforest.
You can check out footage captured by one of the villagers below.