Something happened

I'm using aneros since 3 weeks and it was enjoyable from the first day, but in the last 2 session something special happened.
After more than an hour trying different kind of muscle movements and positions i started getting very aroused (this happended in every session, but nothing further). But this time i started having the feeling like my rectum was "squeezing", and the pressure from the massager become more effective: I could clearly feel the action of the massager again my prostate or penis base (i'm not really sure which one), and the pleasure become higher at any contraction. After a few i started feeling heat inside my chest, my heart was pumping like a piston and my whole body shaking. I really felt on the edge of some kind of climax, but did not reach the "point of no return" from which the process goes on itself: Voluntary action was still necessary, but since it was difficult to keep control in such state, i lost my concentration and the process receeded. But it was still amazing!
So what was that? Am i on the right way to super-o? 🙂