2nd time 'sponging' my feet. WOW!

[deadcat]

I got the downloadable version of Robert's Astral Dynamics book and for the second time (techniqly the first 'complete' session) worked on my feet. I really thought I would have all sorts of blocks, but I was able to do the full foot sponging of both feet simultaniously. But what I really found interesting was that the pleasant 'buzzing', 'tingling' sensation worked it's way up my legs and into my lower abdominal area without me doing anything! It sat there for about 1/2 an hour before finally fading away and over an hour later my feet are still 'tingly' and my legs feel kind of weak! Very impressed with this method and surprised at my own seeming lack of blocks in this area.
Does this happen often this 'sensation migration'? Is this a good or bad sign? Could it be an indication that my energy channels in that area are already very open?
If this has been discussed elswhere just point me in the right direction.

Thanks.

[CFTraveler]

The feet area is usually the most sensitive, and I had long lasting sensations at first but I didn't have the migration happen, not sure if it means something.