Anyone got an example of a blend layer per bone with multiple layers


I was going through the animation tutorials yesterday and while I understand the basic idea behind blending I was curious to see some more complex examples. For example - in the tutorial he’s using a blend of punching montage with basic walk so he adds one element in config , then sets spine_01 and that’s it. But I see that the node has an option to add multiple layers and filters and even something called blend depth.

Curious how this is used outside of this basic blend functionality. Are there any more advanced examples of this out there somewhere ?