It will be great if we can have internal clip and external clip side by side so we can clear see the difference. I'll suggest the following 4 pairs different clips for both "internal" and "external".

1. punch to the head.
2. kick to the chest.
3. lock on the elbow.
4. hip throw on the body.

If you do believe that there is difference between "internal" and "external", would you mind to share your clips here?