Or, at least, it's amazing how often I see them... had 99 three times in four hands, and lost with 2 of the 3.

Full Tilt Poker Game #16493942072: $2 + $0.10 Heads Up Sit & Go (12219790, Table 1 - 15/30 - No Limit Hold'em - 4:10:15 ET - 2009/12/03
Seat 1: RichMa (315)
Seat 2: NF88 (285)
RichMa posts the small blind of 15
NF88 posts the big blind of 30
The button is in seat #1
*** HOLE CARDS ***
Dealt to RichMa [9c 9h]
RichMa raises to 315, and is all in
NF88 calls 255, and is all in
RichMa shows [9c 9h]
NF88 shows [Th Kc]
Uncalled bet of 30 returned to RichMa
*** FLOP *** [7d Qd 9d]
*** TURN *** [7d Qd 9d] [8d]
*** RIVER *** [7d Qd 9d 8d] [6h]
RichMa shows three of a kind, Nines
NF88 shows a straight, Ten high
NF88 wins the pot (570) with a straight, Ten high
*** SUMMARY ***
Total pot 570 | Rake 0
Board: [7d Qd 9d 8d 6h]
Seat 1: RichMa (small blind) showed [9c 9h] and lost with three of a kind, Nines
Seat 2: NF88 (big blind) showed [Th Kc] and won (570) with a straight, Ten high