To comment on "
bong never stays" from my p.o.v., this is first learned in SNT where
bong immediately recovers to punching position. Then in DCS we do the same with a partner's arm for reference of how to perform the
bong then immediately drop the elbow to recover to punching position.
In application,
bong is a sudden, jolting slap, like a
paak from the elbow when we don't have room to use the arm at length. The desired result is to affect the opponent's facing and open a line for the
wu to continue into a central line sweeping punch as
bong immediately drops the elbow to recover and cut punch again.
All this should happen in a nanosecond. If
bong fails to recover fast enough, we won't be sustaining a watertight flow of attacks, and the opponent may have an opportunity to recover, intercept, and exploit our position. So,
bong never stays. It should barely be seen even by an onlooker.
Oh, and in reply to the original post, other "hands" like
taan and
fuk are just training tools for developing the punch and are not taken into a fight. Of course, a punch never stays, except in bad technique demos.