What is the reversed vomit exercise? Like any exercise I think there is pros and cons, the questions is can you make it worth!
I've heard them called "Dry Heaves". I don't do them, but a good friend of mine, who has a successful teaching studio likes them. I imagine they are helpful in complimentary ways to the vomits. I think vomits are very helpful, so I should probably be doing dry heaves as well.
http://www.talkbass.com/forum/f23/vomit-exercises-151490/ This exercise but i thought of turning it around, always go up to an A4 (440) and move up from two octaves down.