Let me help David S. and Jason W.

Bong Sao as other schools call it (WC in particular) , is something WE DON'T Do. It's a different tech. entirely.

But you are both correct in saying we have a low inward forearm block, that we use in CLF. Other CLF schools have it to, but the call it something different. Hung Ga people have it as well. We call it Bong, but that is not the name other schools use. I will find out the name of the technique, as to bring more light unto this subject.

If anyone wants to help, it's the technique, as if you had your hand on your waist/hip. Now, you bring the arm forward and your palm is parallel to the floor, elbow is still bent. It's used to block mid-level body punches and thrusts from spears/staff. Your other hand is held up by shoulder, palm facing out. I'm sure you guys know what I mean, I just don't know a different name for it.

I think it's done in Fu-Pow's web clip several times.