Can't believe I didn't remember this sooner. From the "Developing a Strong Jab" thread: http://www.martialartsplanet.com/forums/showpost.php?p=1074605931&postcount=9 A good way to develop this is by assuming a front or fighting stance, then slowly leaning all of your body weight forward onto that lead leg. Eventually you'll reach a point where you feel like you're about to fall straight forward, and that's when you quickly step into the other side stance and simultaneously execute that lead straight. Try performing one handed pushes on a heavy bag to really work this feeling. Once you get this down, start working it without the switch, again in the air and on the bag and mitts. This is how to apply that same idea using ido geiko. Though different from Dempsey's oft-quoted description, it is along the same lines as the shift with a falling step he mentions later.