I saw this yesterday on the news about a zipline in Ortigas. It was somehow similar to the Treetop adventure in Subic the only difference is there was no tree where the two end points of the cable were hanged also that it was motorized so there is no need to make use of the pull of gravity just to travel to the other end of the cable. The travel speed is constant and is not dependent on weight.
It is the latest attraction found inside Circulo Verde in Quezon City and was claim as the first motorized zipline in the city. They currently offer the Superman Zipline where you would experience to fly like in the Superman position at a height of 100 feet, 200 meters in length and also you can experience to move like silver surfer or maybe iceman at the height of 80 feet, 400 meters long back and forth.
How to get there: From E. Rodriguez Jr. Avenue (C-5) turn into Calle Industria. Circulo Verde is at the end of the road before turning towards F. Manalo Bridge. Click the map to enlarge.
*Video from youtube picture from zoom treetop adventure facebook account