hard to explain without showing in person, but it makes rodeo's amazingly simple. got rodeo 5 first try after being showed this. if you spin left, punch your right arm slightly left and forward. about halfway through the full punch you want to start turning the palm of your hand over, so that at the end of your punch, your thumb will be pointing to the right and your palm will be flat.
while doing this, you want to bend backwards(like your doing the limbo) and look down and over your left shoulder. keep your left shoulder moving in the direction of the spin, and keep looking over and down while your shoulder pivots, and you should go into a rodeo.
if you do it right, it is a very simple way of pulling rodeo 5's and 7's depending on how hard you throw it. sounds complicated, but very easy when done right.