"Nek minute" is often used in a way that leaves the end of the story open, meaning the listener is left to only presume what had happened, though it's not always used like this.
Also the person enlightening you with their wonderful story can replicate what happened themselves.
Can be also pronounced/spelled as "nek minnit", "neg minute"
"He said he loved me.. nek minute"
"I told her it tastes like candyfloss.. nek minute"
"She disagreed with her husband.. nek minute"
"Doesn't matter if you're black or white.. nek minnit"
"I ate Mexican this morning.. nek minute I was shitting piss"
"I watched Seizure Robots.. nek minute" *reinacts seizure*
"I started watching a movie with Tom Cruise in it.. nek minute" *reinacts shooting self in the FACE*