chicagoTaiJi wrote:well peng means expand and refers to a specific motion which involves the whole body expanding (and typically, a step)...
Aha,
now I see what you're talking about.
As it may have been noted previously, "peng" means more than just a specific motion. It is a "jin" that is expressed, as felt by an opponent, similar to a continually-expansive and yet confound-to-a-shape quality of a basketball or another similar object. There is also "peng" motions/postures in tjq forms, and the related applications of those motions/"postures". It seems that you were talking about one of the "standard" applications, whereas others may have been talking about the other "meaning" of the term (which no one can "see" in a clip, but only feel.)
FWIW
Graham --
P.S. Oops, others posted similar things in the meantime... See what happens when you communicate in a reciprocating and polite fashion?