Probability of Pocket Pairs turning into Quads twice in a row?

[PocketPaul]

Playing micro limit online last night I limped in MP with pocket 3's and flopped the set [img]/images/graemlins/smile.gif[/img]. Then to my surprise the 4th 3 appeared up on the turn. [img]/images/graemlins/grin.gif[/img]

A few hands later (but the next time I had a pocket pair) I was dealt pocket 9's and once again I flopped the set [img]/images/graemlins/smile.gif[/img] and got the quads on the turn [img]/images/graemlins/grin.gif[/img]. Both hands gave me nice juicy pots of around 12 - 15 BB each.

My question is - what is the probability of 2 consecutive pocket pair hands turning into quads. Also what is the probability that in both cases the quads are formed by the turn?