Some people hold with middle and index, i.e. Eddie Van Halen
Others hold with both i.e. Steve Vai.
Generally speaking, however, it's a grip just between your index and thumb. And you are generally taught to hold it with just enough force to keep from dropping it.
Back In Black isn't a song. It's a divine call that gets channeled through five righteous dudes every thousand years or so. That's why dragons and sea monsters don't exist anymore.
