I would love to see a vid or pic of that. If it is what I think, WOW!!

Never seen it done myself. With a strong core and good flexibility, it should be possible (with a lot of practice). And the person who could perform such a feat would have a core developed beyond the dreams of any of the '1000 crunches per morning' crowd

The abe roller (little wheel with handles) is also a kickass core exercise, I'm noticing huge improvements from that and weighted crunches.
That dumbell pistol snatch on a swiss ball would be AWESOME to see!

Hey guys, thanks for all the tips. I've been doing weighted crunches/sit ups for the past week and also a lot of stretching and i'm seeing good improvement, i'd say my back is at about 75% now, still not perfect obviously but slowly getting there. Also if it can be of help to anyone, here's a link to the stretch that helps me the most (http://www.drbenkim.com/articles-lowback.html), it's #11 on the page. When I do this stretch, it completely relieves my back pain, and I found that the more that I do it, the faster my back recovers, sure the weighted crunches and sit-ups must help, but I found that stretch to be the one that makes the biggest impact on the pain. I've also included other hamstring stretches in my stretching program and not only does it help my lower back pain, but it also helps with the "inner hip" pain I had from time to time.