I don't know ask your dz people. Unless you have lots of swoop experience I'd advise you not to do anything other than double fronts for a while. I was thinking I knew the answer to the Hook turn thing but I honestly don't know. I would say hook turn would half to be performed with front risers and has to be kind of jabby as in pulled quick to ellicit some sort of drastic turning motion. I would say a carving front riser turn does not fall under a hook turn category. As for the people who yank a toggle, spin X amount of degrees and impact. Those are called panicked dumb ass turns, which are done by people who generally have no front riser experience... The aerodynamics of the two are entirely different.