His legs raised...in what way? If you look at a recent post with a sub in a similar predicament, he was on his knees, legs sort of underneath him, bottoms of his feet facing behind him. But there's something else here that can be raised, or cranked, to force him to raise not only his legs but his entire body...with not much else to support it other than his locked head and hands, and the strength in his legs, and a bit of his abs too. You were definitely on the right track in your first comment on this post. Although the position he ends up in...is different from anything else I've ever posted that was similar to this one. His legs ended up having to come out from under him, in order to avoid stretching his balls way more than he wanted them to be stretched. ;-)