Mandarin 3rd Tone

Any students or speakers here who can weigh in on this?

I've heard in several recordings native or presumably native speakers pronouncing third tones with kind of a skip in the middle—it comes out almost disyllabic—when pronounced fully at the end of an utterance, and I would like to know what is up with that. Not sure I've ever heard a male speaker do it.

I think the recordings can be quite extenuated.  It's not really disyllabic, and especially not so in actual speech.  Listen to how they pronounce in movies- it's more important to know how to pronounce it in a sentence than alone.