"When you’re riding a bike and breathing deeply, something about the blood flowing fast and oxygen flooding your system heightens the senses — especially the sense of smell, it seems. Sometimes that’s a good thing. Not always. Here’s a map of sensational sniffs discovered along the western legs of the Burke-Gilman Trail during commutes between Shilshole and Fremont. –Brian Cantwell"
http://seattletimes.nwsource.com/html/outdoors/2013025700_nwwburkearomas30.html?cmpid=2628