Rolling is the high you get from droppin` (eating/swallowing) a baum (or ecstasy). About 30min to an hour after droppin` a baum you will start to feel this relaxed, flowing body high. it'll start off soft, and then get heavier. The intesity of your high will rise (which is called peaking), and then drop a bit. Then it'll get a lil' higher, and drop a bit again. That "rolling" feeling will continue untill the high is done (between 5-8 hours).