On a whim I added the rudder trim keys to my scantily-buttoned joystick. I went into a plane and got speed up then held a vertical zoom. With constant trim input I was able to literally stand on my nose, THEN execute a FLAWLESS hammerhead. This is not possible under normal conditions, as I'm normally looking back, moving my view, and the like. I was literally taking all my time just to trim rudder. With a set of pedals I think I'd learn to love the hammerhead move.
Oh, I did this offline in a P47N, btw.