Bong never stays

[kung fu fighter]

Sorry, but my understanding and application of the Bong would not entail using it to deliver a strike or the like.
In my mind this would be something different and no longer be a Bong.

Of course, I am open to discussing how a Bong can be used to deliver a strike without it becoming an Elbow strike.
In my WC/WT we had several differing elbow strikes from various angles.
In one of the Chi Sections we had a trap using the elbow but it was not a Bong, despite the shape being somewhat similar.

I wasn't referring to bong being used to strike, although it probably could be used as an elbow, forearm, palm, or finger strike. I was referring specificly to bong being used to transfer energy into the opponent center axis to disrupt his center of gravity as master TST explains in the video below. My intention is always to attack the opponent's center line, however If the incoming momentum is so great that it's too much for my structure to handle or sustain, the incoming momentum will turn or adjust the angle of my bong sideways to guide it, much like a bullfighter dealing with the oncoming momentum rush of a charging bull or what happens when two spinning momentum make contact ie two spinning tops.

https://www.youtube.com/watch?v=iNRgatQXeZg
https://www.youtube.com/watch?v=bWggfQrN-lQ