“Only Using Food, Tell Us Where You Live” was the assignment.
Although there may be a unique connection between Doritos and Glasgow, the only thing that grabs our notice is how well the chip functioned as a pointer. Fingers are usually meant for that kind of thing, but this delicious nibble was just as good, if not better. Particularly considering that Glasgow appears to be extremely little and obscure on the map, we assume he took the greatest hint he could.
You probably didn’t realise that the sharp side of Doritos chips could also be used as a pointer at any moment, despite the fact that they are already among the greatest foods on the planet.