Greetings all,
DavidJ, usually I have to read movement descriptions several times to obtain the gist of the scene, but your explanation was so clear that I understood it the first time. Nice depiction of how to roll backwards.

I am familiar with this particular type of technique. I attempted it a few years ago, when I was studying gymnastics movements from a book I had found. In my trials, however, knowing that it was quite dangerous to practice these types of acrobatics without qualified supervision( as you have wisely advised), I have never been able to acheive a full hand-stand. It always ended up being more of a roll, with too much strain on the back during the completion stage. I also experienced a few scary moments, when I had gathered insufficient momentum to go beyond the hand-stand(my squat-stand), and not having my chin tucked properly, I came close to breaking my neck.
It would undoubtedly require much supervised practice to execute this movement under the duress of an opponents pressure. I have never imagined the possibility of MY applying this method efficiently and/or safely in an interactive confrontation...maybe one day.
Polaris and Jeff, have mentionned falls(occuring from sweeps and throws) in which recovery is impossible, borne out of sheer speed of acceleration and pure disorientation; the more agressive sweeps.
I am guessing that the degree of turning power of the throw in question would be a major factor affecting the landing point. To explain what I mean: If the lower back makes contact with the ground initially, then a trained practitioner could utilize a roll backwards effectively to escape his opponent and deflect the 'smashing' effect by using the created momentum to roll parallel along the floor(to avoid grounding into the floor).
However, as has been stated there are many different types of sweeps to contend with. If I were swept with more force, and landed on my upper back instead, I don' believe I could gather enough momentum to complete this rolling process without injury to my neck or back.
Breathing out on impact seems to be universally embraced by practitioners, as paramount to the success of falling unharmed.
Wushuer has suggested laughing. Bruce Lee made his point very dramatically and (loudly) vehemently in a slightly different manner when he said...Waaaaaaapaaaaataaaaoooweeeaa! I have heard that there are different sounds representative of different releases and absorptions of energies. What is the expression for this method? Is this used in Taijiquan practice?
So, to roll or not to roll.... from what I have gathered through these last few postings; The appropriate reaction to a sweep or throw would depend upon the point of impact and degree of accelleration and disorientation involved in the situation.

If one lands in a good position one could take advantage of the roll backwards technique.
If it is 'impossible' to react due to the accelleration and disorientation of a powerful sweep/throw, then I suppose one must accept the inevitable, without hesitation, and attempt to absorb the fall using the methods of proper relaxation and breathing.
Polaris makes an excellent point about intercepting. One should place most effort foremost on becoming skillful at avoiding the sweeps and throws in the first place.
I enjoyed reading some of the different possibilities of intercepting such attacks. I am especially interested in your mention of using FaChin as an intercepting defensive-attack. Defending with simultaneous retaliation sounds very efficient to me.. Have you any other comments on this attacking while defending method?
Have we basically gathered all the primary 'corners' here on this matter of handling falls correctly?
Quite the crash course,
Now I stand corrected, or perhaps fall corrected
Thanks to all,
Best regards,
Psalchemist.

[This message has been edited by psalchemist (edited 08-09-2003).]
[This message has been edited by psalchemist (edited 08-09-2003).]