having been to over 60 countries, and gone for runs in most of them, here would be my list of strangest:
Yangon, Burma - almost no tourists there to begin with, so just seeing a white face was odd to them. Just stares from every single human I passed.
Java, Indonesia - Laughs and pointing from many, and hi-fives from one old man.
Romania - I accidentally ran into a gypsy(Roma) encampment while following a forest trail. Dunno what they thought of me, I got the heck out.
Fiji - came up on a group of farmers in a sugar cane field. They walked into the road with their machetes to meet me. Thought I was going to die. They had come out to offer me cold water from their ice jug.
Colombia - ran along a beautiful forest road outside Bogota. Got to a military checkpoint. Asked if I could keep going. Soldiers said "um yes, but beyond here maybe there is FARC."
Turned around.
China - running in Shanghai I had two separate Chinese guys start chanting "USA,USA,USA" as I ran by. How did they know?