I associate the aroma with grass track racing. Wasp sidecar outfits with 1000cc V-twin Westake and Godden engines thundering round a field sending up flumes off grass and soil and the air thick with the smell of Gastrol R and hot engines. (And fag smoke and burgers). Magical.
People who stop on stairways in corridors when there’s plenty of space for you to both pass and making an exaggerated bowing/spread arms gesture as they do it so they can make it clear what an enormous courtesy they’ve made for you and that their manners are much better than yours because you didn’t do it.
To think I thought they were just being friendly and nice! Now I know they are being bastards I'll head butt anyone who does this for me...