Figured you'd see this at some point, but here it a link to SS today:

http://swimswam.com/...-that-the-rest-dont/

Keep the head down just like in butterfly and hips just as active. Press the T with each stroke cycle. The idea is the same as skipping a stone. You push yourself down into the water and the water will push you back up and forward. On the pullout, pull and kick before you come to a stop in the water. Good luck!