Devastating swings! Can you tell me how to throw "russian hooks" ???

[OMGWTF]

Ok I have two videos here, showing just how powerful and knock out inducing these non western boxing punchers are.

Can you tell me how to throw this technique?

Ive tried to learn it from you tube etc and I may well have learnt it, but the only thing I have to go by is my punching bag and when I hit my bag with these punches, the bag barely reacts at all.

The punch feels incredibly powerful in the air, the central fugal force is immense, and it reaches incredible speeds, but when it connects with the heavy bag my arm just gives way and it does barely bugger all to the bag. (Im wearing boxing gloves or bare fists)

When I throw a normal hook with my arm bent at 90 degrees there is alot of bone structure behind the punch and my arm dosnt give way at all and there is a big impact on the bag.

These russian hooks are very long range hooks and the way im doing them means they have no bone structure behind them im not sure if they are meant to have bone structure behind them like normal hooks or not? Do you know?

Basically a russian hook is a very long range hook with huge speed/whip and power but im not sure if they have and solid structure to them or not?

Here they are in action...






and








If anyone can tell me how its done I would be HUGELY MASSIVELY GRATEFUL!