Blue Man Group. one of the most origional bands i have even seen/heard. didn't use a single word in any of thier songs (until thier second album, the Complex), and they use an array of intruments made of mostly PVC pipe. they do use "regular" instruments like guitras and drum, but how many opther bands to you know of that bang on PVC pipe, paint pictures using drums and marshmallows, and can bang on 40 foot drum walls? all twice a night, every night, except on saturdays, when they play 3 shows.