Hi, I am really glad to see that you have read the post :)

The third tone is really tricky, in commonly spoken Mandarin it doesn't rise again. I wrote on the post this little comment about it:

The tones are depicted within our natural voice range, within that interval the first tone is a high and flat pitch, the second tone us a rising pith, the third tone is first a descending then a rising pitch (in natural spoken language it occurs mostly as a descending soft tone called half third tone), and the fourth is a sharp descending pitch.

So there you have it, what we mostly will hear from native Mandarin speakers (I dare say 80%+ of the time) is the half third tone.