Tampa businesswoman Tina Greene and her estranged husband Ken have been tearing up the competition on this season's installment of CBS' hit unscripted competition The Amazing Race -- winning the race to the show's last three "pit stops," including the one in Sunday's episode.

Indeed, the couple this week was shown nailing a "fast forward," which allowed the two to bypass about half the challenges in the episode, including matching the facial markings on men dressed like ancient New Zealand warriors and choosing between stamping a load of Kiwi fruit into two glasses of juice or building a pair of carts with huge sails to drive around a track.

Instead, Tina and Ken scaled to the top of the Southern Hemisphere's highest building -- heights-averse Tina worrying all the way -- to grab a status of the Travelocity gnome and win a helicopter ride to the pit stop. As their winning streak progresses, the show has seemed to ease up on its portrayal of Tina as aggressive and critical, this week focusing on the bickering of long distance long distance couple Aja and Ty, who barely avoided elimination.

Tina and Ken won their second trip from Travelocity -- this time to Rio de Janeiro during Carnivale. The remaining teams raced to complete a curious array of tasks -- grabbing a picture with markings on it and trying to match those markings to the face of one man among a group of New Zealanders made up like traditional Maori warriors; later, the teams chose between stamping out two glasses of Kiwi juice or assembling two sail-powered carts to race three times around a track.

In the end, Southern belles Marisa and Brooke were eliminated, after running dead last throughout the entire competition. Only a couple more mediocre teams remain -- leaving just a few weeks before the competition picks up fiercely as only the teams with proven skills remain in the game.

But so far, the past few weeks, there have been Ken and Tina on one level and the other teams on another. How long can this super-competitive duo stay in front? See extra footage from their win here and here.