I've spoken on this subject before, and I know it's hard for a lot of people to understand this phenomena. Hell, even I don't really know. But I'll tell you a little about my experience with it, which is somewhat new.
I began meditating a few years ago. At first I felt nothing. Then over time, I began feeling and doing weird things. Some of which included speaking gibberish uncontrollably and doing spontaneous yoga postures. Some of the "gibberish" later turned out to be Sanskrit mantras, while the rest of it I haven't been able to translate. It sounds like a cross between Hebrew, Gailic, and Latin. In any case, it only happens when I meditate, so I don't do it unless I'm in private. But I'm sure it's the same thing as what Pentacostals and others do when "Speaking in Tongues". Crazy stuff.
-dolph
