Usually from what I've seen from a few online videos, when a Hung Gar(or any other art that applies the claw) explains how to use the tiger claw, one of the moves are if the opponent punches with the right hand, you step aisde then either block or claw-grab his hand with your left hand and then grab and push his head with a tiger claw with your right hand. But then they just stop right there and don't go further as if saying that the claw to his head ends the fight.

Just curious, does the pushing his head really end the fight?He might not go down or retreat backwards easily if he is stronger.
He could also out of desperation struggle using his right hand to release it from being grabbed or attempt a left hook with his other hand or just kick with his feet available.

And no,I'm not trying to question the effectiveness of Hung Ga since I'm also a practitioner of Hung Ga. :)

*EDIT* But then they just stop right there and don't go further as if saying that the claw to his head ends the fight.
Just curious, does the pushing his head really end the fight?He might not go down or retreat backwards easily if he is stronger.
He could also out of desperation struggle using his right hand to release it from being grabbed or attempt a left hook with his other hand or just kick with his feet available.
Yes, for a demonstration it ends there.
Here's my long winded application breakdown of the technique you described.
-Take the angle using footwork & butterfly palm to bridge the gap to your opponent.
- Crash into your opponent unbalancing him & lock up opponent's leg with your stance.
- Left bridge on top of opponents arm pushes/sinks downward & claw grabs the groin. You need a solid stance to make the sink happen.
- Right claw strikes the chin causing a whiplash that rattles the brain.
- Once the energy of the strike is released the fingers claw into the eyes.
- Eyes in one hand, groin in the other - tiger techniques finish the fight.

Understand the usage of tiger is to end the fight. So you must be close, as in right on top of your opponent. The aggressive nature of the tiger doesn't give the opponent the time to counter. Your weapons must be developed to use tiger effectively: stance, bridge, waist & tiger claw. If he's too strong then all of Hung-Ga's five animals come into play.

There are many applications of the tiger claw, e.g., grabbing, slashing and striking. (Watch a Fu Hok set on YouTube and you'll see several tiger claw variations.)

Just as a single punch may not end a fight, you may have to do something after the tiger claw (although, as HG1 points out, a correctly executed tiger claw can be devastating). However, as with any move, what you do after the tiger claw depends on many factors, so the demonstration ends there.

To use the Tiger Claw effectively, you must train the claw for many years to develop the power, otherwise, your Gung-Fu is empty. Too many people no longer train lien-gung. To think that yuo will be able to use fu-jow without properly training the claw is folly.
The claw is used many different ways-palm strike with a rake,grabbing into the flesh, muscles, tendons,tearing, ripping, dotting,crushing,etc.

Pretty good explanations... but, like Ten Tigers said without the training it's moot...

Another thing...not to down play any advise, but a lot of these questions are best talked about with your sifu. Not fully understanding a technique or knowing how to use or apply a technique properly can be very dangerous to you as well as any opponent.

I have people that come to train with me and they have no clue as to what they are doing...yet they're trying to use stuff they've seen on you tube at full speed. :mst: