How to pronounce 一發 in Cantonese (3 out of 4):

正當眼見事情去到一發不可收拾嘅地步
And it's just that the situation is getting to the point where it's impossible to recover.

Cantonese Sentence Breakdown

正當 zing3 dong3
legit; legitimate; genuine
legal
眼見 ngaan5 gin3
see with one's own eyes
事情 si6 cing4
thing
去到 heoi3 dou3
reach
一發 jat1 faat3
classifier for bullets
不可收拾 bat1 ho2 sau1 sip6
unmanageable
koi3
indignant
generous
to sigh (with emotion)
地步 dei6 bou6
extent