After reading Angies Banjo Silver Strings online magazine I viewed the cited youtube video of Long Journey Home by the Johnson Mountain Boys:
http://www.youtube.com/watch?v=lNRFoFjphOk&feature=related
These guys are insanely fast. Maybe they were behind schedule and had another gig to play that night. It almost looks like they sped up the video. I wondering if these guys were a fire hazard.