I don't meditate atm, although I used to and plan to start again. When I sometimes meditated, when I got to a certain point in meditation I would experience a weird bouncing effect. Its hard to describe. It's like I would be peacefully focused and my meditation was progressing, perhaps to a deeper state but then all of a sudden my mind would snap back as if this progression I was experienced regressed to an earlier point. Then it would feel like my mind bounced back and forth for a few moments. I would liken this feeling to as if someone some was pulling on an elastic band and then suddenly let go. Sometimes it happens to me when I'm having trouble sleeping and I close my eyes and try to force myself to sleep. Does anyone else experience this? What is it?