Straddle back mount
Round-off straddle back
Enjoy your broken butt! That is all I can possibly think of when presented with the notion of this mount. Unlike many of its olde-tyme mount sisters, this one is actually kind of realistic in a modern elite gymnastics context. You could totally connect a Stalder Shaposhnikova out of it without being hit by the empty swing police. Or, you could if it were not valued at B and therefore entirely pointless because so is a giant.