The Downward Foot Block Drill

The video shows it better than I can explain it.

The main idea is to strike the side of an incoming strike (or kicks) to the lower torso.

I strike the side by swinging my arm widely.

I acquire power from a number of sources.

My strongly held body, firm core and bent knees add power to my swining arm.

The turn of the elbow one way and the forearm the other way also give my blow power.

This is a tricky block to use properly and should be learned from a knowledgeable instructor.

It requires a lot of practice to learn a a lot of practice to keep it a useable weapon.
https://youtu.be/sLKAIjnVUFw
Without prejudice