I have had a similar occurrence, but with another sense. Mysense of smell is abnormally acute, and I have experienced the sensory overload for extended periods of time after the time and location of the source of the smell has long since passed, such as driving in a car, if someone is smoking a few cars ahead of me, I'll be able to smell it miles and hours down the road, long after they turned off the road or whatever. oranges are big, and so is blood. the smell of weasels, badgers and teh like are long-lasting, and i can never seem to get the 'smell out of my nose'