I think the most important thing about playing any sort of run is making sure that you get back to the rhythm in time. When I listen to Riley Puckett, he seems to go completely off to outer space, yet he always gets back to that bass note to keep the tune driving. When I heard him for the first time I realized I had been hearing him for years through my favorite players, and his style for putting great runs into a tune is something I try and do with my own playing.