Close encounters ...

... I have written elsewhere about meeting these timber wagons on the Military Road:  
Riding the arrow-straight Military Road that runs parallel to Hadrian’s Wall in Northumberland you cross paths with heavily laden lumber lorries carrying timber south from the forests at Kielder.  At 60mph they create a bow wave, an invisible wake of air that unsettles the bike at a combined speed in excess of 100mph.  For a very brief moment in time the air turns warm and heavy with the scent of diesel – it is an oddly intimate and uplifting experience.
Having experienced this many times since, I would replace the word "uplifting" with "chilling".