***UPDATE: Megan brought up a good point that I want to make sure and share with you regarding this type of training... Once you have gone past the point of recovery, you should NOT fight to save yourself, but take the fall. Let go, and fall. Otherwise, you can really hurt yourself over stressing your tendons in your knees while you try to overcome the force of the fall.***
These drills are meant to train the core and stability muscles to recognize "uh, oh!" the second you get out of balance, and recover back into balance, before the bobble becomes a full-blown fall.
Knowing when to recover, and when to let go... well, that's beyond my expertise at this point. My suggestion is to listen to your body, and utilize those well trained core and stability muscles to hold and get back in balance quickly. If it doesn't happen, let go, and take the tumble!
To see the drills and video, visit this link, or scroll down.