Question: Watching [A Sun](https://en.wikipedia.org/wiki/A_Sun_(film)) (Taiwanese drama, available on Netflix) it sounds to me like the characters are saying 他 as hā. This seems to be true even when people aren't speaking particularly quickly. Am I hearing a regional pronunciation, or is that just the *end* of tā without the plosive (*plosive* is the very first part of the T sound where the air stops)?

Answer: 
The commas are just commas.

得意忘形：dizzy with success, lost in exhilaration  

将 = 把 as Ben Jackson said.

I don't know what happened before this. The tiger must have done something cool, he is very pleased with himself. There is a farmer with a weapon hiding in the reeds. Looks like the Tigerrr will be a nice fur rug soon!

老虎得意得简直忘了形，  

The tiger, dizzy his with success  

完全忘了注意周围会有什么危险，  

completely forgot that there might be danger in his surroundings  

屡次从芦苇丛中挑起，  

repeated stirrings from the reed clusters  

将自己的身体暴露在农夫的视线里.  

put him in the farmer's line of sight
得意忘形 is a Chinese idiom. This sentence breaks it into two pieces "得意" and "忘形".

将 is equivalent to the "make" in the "make itself visible to the farmers".

Functionalities of commas in Chinese are often different than those in English. Here they are used for separating the long sentence into small pieces so that reader won't get lost.