Second hand pot smoke is like any other second-hand smoke. The ill effects of the drug, as well as any carcinogenic properties exist in the experience of the bystander as well as the user. However, the idea of a "contact high" where a person near a marijuana smoker receives a buzz, although very popular, is not generally accepted by drug testers. If you fail a UA and inform the person that you
. were simply hanging out with people who were smoking, but you abstained, they will likely disregard that excuse. Some websites claim that you don't have anything to worry about (http://www.goaskalice.columbia.edu/1289.html), but even they admit that small amounts will show up in the test.
