Persian (Farsi) to English Art/Literary Poetry & Literature Colloquial Narrative

Greetings,

I think that the sentence “دارم گور خودمو می‌کّنم!” expresses the linguistic point I wish to investigate reasonably well.

As you will have noticed, there is a tashdid on می‌کّنم. Why would someone pronounce می‌کّنم with a tashdid (as I am told people do)? I.e. 'mikkanam' for 'mikanam'. I've certainly seen nothing like it in any kind of Persian grammar or textbook.

Is it for stress? In that case, the translation of the above sentence will have to take that into account, won't it? Or is it perhaps just a very minor stress?

Best wishes, and many thanks,

Simon