Many people I know have had similar experiences after practicing something called "Headlessness". YOu can find out more at
www.headless.org Another method of acheiving a similar result is a process called "Big Mind" created by Genpo Roshi. You can find out about the Big Mind process and even get an audio that will lead you through it at http://www.bigmind.org/audio.html
The Big Mind process was incredible to me when I first went through it. If you get it it will be pretty amazing. If you don't get it the first time send me an e-mail at roddaut@prodigy.net with the subject line BIg MInd and I'll help explain the one part of the process that people who don't get it the first time usually miss.
Good luck.
