Emphasizing physics tricks, in my opinion is not qigong, it is simply entertainment will little or no redeeming value or context to martial arts or even to the path of kungfu.
I'd disagree with you here, KL. I think a basic understanding of physics is critical to martial arts, especially in CMA when it comes to na and shuai (but also important in basic strikes, of course). Leverage and breaking is important stuff. I know what you meant by that comment, but I'd also argue that a basic understanding of the 'tricks' is fundamental to being part of the jianghu - it's a key to penetrating CMA culture.