And welcome to the latest installment of the gentle wisdom born of shared experience rivalry between the USA and Mexico.
Their innocence-versus-experience rivalry morphs into Duan's unrequited love after she decides, somewhat incredibly, that he's the one.
Firefighter Ehlberg has experienced the rivalry from both sides.
Rangers Coach Ron Low, who was experiencing the rivalry for the first time, said: "You can feel it in the building.
And contrary to myth, even the great infrastructure companies of the past -- electricity, phone service and railroads -- experienced tremendous rivalry before governments turned them into monopoly "utilities".
This may be true in our lifetimes, but you do not have to look far back in history to find an example of such experience: the rivalry for global influence between the United States and Britain.
While an experienced observer, if asked to, could probably differentiate between the conditions, patients had no prior experience with rivalry, hence unlikely to spot the difference, and were not informed about the two distinct presentation methods.
Heidi Hargreaves, who runs a gift shop in Nottingham called Dukki, has experienced this rivalry.
Could today's children experience "sibling rivalry" -- with the family dog?
The strength of dominance experienced was more in line with that achieved during flash suppression rather than the dynamic mixed states that are often experienced during rivalry transitions.
(You can experience binocular rivalry by looking at your own nose. Although each eye sees your nose from a different angle, you consciously perceive your nose from only one angle).
