I had a kung fu master hit me like a normal person would (such as a boxer) in the stomach while holding a phone book against my stomach for padding. The pain from the hit covered a large area. When he hit me again later (using the phone book again as padding) he said he was going to channel his chi through the phone book and penitrate my stomach just in a small area about the size of a silver dollar and as the force penitrated it would expand. The result was much more painful this time. The force actually felt like it entered my stomach and after about 2 or 3 inches inward the force started to expand as it penitrated deeper. You can believe this or not but it did happen and this kung fu master said this was a chi strike.
well, I don't know what that guy actually did, but I've been able to deliver similar strikes that are definitely NOT qi strikes, unless my qi was purely accidental and I was completey unaware of it.
I first encountered the phonebook test when I was studying wing chun. It's an interesting test, it enables the receiver to feel and experience the force of the blow, but at the same time the phone book protects him from actual injury (use a THICK phone book, something from a big city).
My Wing Chun sifu pulled out the yellopages and we conducted the test. I held the book to my chest, and he hit me using the kind of short range power that is developed thru Wing Chun practice. He's a pretty big guy and he'd been doing wing chun for some 35 years or so. When he hit me, it felt like my whole body had received a huge electrical jolt. I just felt deeply rattled, from head to toe. To my recollection, he never claimed he was using qi. Rather, he was just demonstrating the power that can be developed thru wing chun practice, and it was impressive.
I then took my turn, and he held the book. I elected to strike using a Tibetan White Crane method, and my sifu was interested in experiencing that since we had discussed it in the past and he was curious.
In White Crane, we use a very relaxed, full body pivot to drive our power out. I know that most systems marry the strike with the pivot of the body, but it's my belief that in White Crane we carry this to a greater extreme, in developing the technique. In fact, our entire system is based on this concept.
When I struck the phone book against his chest using only modest effort on my part, his eyes immediately glazed over, he staggered backwards and let out a groan. It took him a moment to shake it off, and he said that he literally felt the force of the blow penetrate into his torso like a spear, sort of "bounce" off his spine and drive down into his guts. He felt that it was one of the most tremendous strikes he'd ever felt, to the point where it was frightening. We are good friends now, but before he knew me well enough to judge my character, he actually went out of his way to caution me about ever using these techniques, because he felt they were really dangerous and scary, and someone with bad intentions could really be a danger with it.
When I attended my brother's wedding, an old highschool friend of his was in attendance. His friend had been training kungfu somewhere, and we compared some notes. We conducted the same test, and I hit with with a White Crane technique, thru the phone book. SImilar results to what my wing chun sifu felt. He said he had never been hit like that before.
If my qi had anything to do with this, I was completely unaware of it and I would never make the claim. I was simply using very efficient, high level physical technique in delivering my strike. My White Crane sifu actually says that Tibetan White Crane is definitely NOT an internal art. The way we practice and the way we move, he says, does not allow for the flow and cultivation of qi in the way an internal art like taiji does.
So in getting back to your experience, I will say this: it is definitely possible to generate tremendous power in delivering a strike, while remaining surprisingly relaxed, and it has little or nothing to do with qi. So again, I don't know what that sifu actually did in striking you, but this is the kind of story about which I remain skeptical. I would have to know more about HOW he struck you, before I would be willing to entertain the notion that it might have had something to do with qi.
Again, I'm a qi believer, but a skeptic when it comes to most claims.