OK, I have some good news and bad news. The day before yesterday I found some tweets that indicated where Pekin Express was filming in Las Pinas (put a ~ over the n) about 8 hours or so before they were seen in Ayala Triangle:
Kate Allelou Robenta @kateallelou
Amazing Race, had their shooting at Sarao motors today!! Sayang wasnt able to watch it live! Tsk! #justloveyourown
6:09 AM - 31 Jan 12 via Twitter for iPad ˇ
Kate Allelou Robenta @kateallelou
@lenggables di ko sure eh, basta french version ng amazing race daw.
6:11 AM - 31 Jan 12 via Twitter for iPad
Google translation: I sure eh, just French version of the Amazing Race Daw.
Kate Allelou Robenta @kateallelou
@lenggables kaya nga eh. Intense pa naman labanan sa amazing race.
6:15 AM - 31 Jan 12 via Twitter for iPad
Google Translation: so eh. Intense fighting also on the amazing race.
Kate Allelou Robenta @kateallelou
@lenggables yun siguro yun, check mo yung pics na shinare ko. Galing kay ninong Ed. 
6:21 AM - 31 Jan 12 via Twitter for iPad
Google translation: maybe yun yun, I check my pics shinare. From Ed's godfather.I did some research on Sarao Motors and found out that it's a factory in Las Pinas that makes jeepneys, the colorful small buses that provide local public transportation in much of the Philippines. I also found about 165 pictures taken during the setup of the leg and while the teams were running the leg. An absolutely amazing find! This is the good news. Now for the bad news. Unfortunately, I was at work and couldn't deal with that volume of data. So, I recruited a couple of helpers, who also proved to be at work or otherwise busy. By the time we were able to tackle grabbing all the pictures, they had been taken down.
We did end up with 5 pictures that I'll post below, but what we didn't get was MUCH MUCH more interesting. I feel kind of bad, because that was about the best find I've made here for RFF and I let it get away. I dropped the ball when I didn't try getting some of the best ones when I had the chance after work.
Anyway, from the evidence in the pictures, the race was down to four teams at this point. The jeepney construction yard was set up with a number of items like old tires and colored ropes were threaded around, under and through the items. One person from each team appeared to be following the ropes over obstacles that included at least one teeter totter like board. Whether they were threading a ring along the rope or trying to unsnarl and free their color rope (red, green, blue and yellow I think), I couldn't say. The person doing the task was also carrying a big sponge for some reason. After they finished that, they moved back towards the entrance to the yard and helped push a jeepney out into the yard where a large crowd of people climbed on board, filling it to capacity and then some. Each team appeared to hop on to the back of the jeepney and hung on as the jeepney left the factory for some unknown location. The camera and sound guys followed as passengers on motor scooters being driven by local drivers.
The pictures we got are from the setup before the leg. I will mention that there were 4 or 5 pictures that appeared to show debris high in the air. I'm guessing those were balloons or kites over the yard. Whether they factored into the task, I don't know.
