"Talk about your...." is an expression that serves to introduce an anecdote or example. It's meant as emphasis.
How was the flight?
The flight? It was horrible.. Talk about your turbulence. They couldn't even serve the drinks - the ice was jumping out of the glasses. I guess the best way to explain it is, it's sort of a condensation of :
"You want to
talk about
your example of
turbulence; well, my story can top anything you've got to say."
"Man" is an expression of wonder or disbelief similar to "good heavens," yes. It can be used alone:
"Man, I can't believe you paid that much"
with "oh:"
"Oh man, we're in trouble now"
or as in your example, "man oh man." You can even add another if you like: "Oh, man oh man oh man. What the *** are we going to do now?"