On a clear afternoon on Portland’s residential eastside, the gravelly whine of skateboard wheels on decade-old concrete becomes shrill with speed. Two dogs of unknown breed gallop down the road, all smiles and flopping tongues, towing their master on his skateboard via leashed harnesses.Read more here: http://www.oregonlive.com/outdoors/index.ssf/2013/01/skatejoring_in_the_city_urban.html