Did you ever happen to see my video (before Twitch destroyed it during their change) of where I demonstrated the front-jump-first version of Andrew G's leach? It is quite a bit more efficient, and I don't know why people aren't busy mastering it already (at least Dean, Wes, and Robbie). If one can get it down reliably, it gets 200 points off every barrel instead of 300 off every two. It may also be usable as a somewhat safe and efficient way to wait near the bottom hammer.
Oh yeah, and, if I recall correctly, the standing-jump-first version is possible as well.