Last night at the Oscar awards show Sting accompanied the bluegrass singer Allison Krauss for the nominated song from "Cold Mountain", "You Are My Ain' True Love." During the song Sting played a stringed instrument I have never seen before. It looked like a fat-bellied mandolin, but he played it by winding the base of the instrument with his right hand. He didn't appear to fret the instrument at all. I found the unusual instrument as interesting as Allison Krauss's two million dollar diamond studded stilletto heeled shoes...maybe even more so. Anybody familiar with bluegrass music who can tell me what that windable instrument is?