From the start of the pendulum obstacle section, run across the arms of the fake bridge which collapses, and grab onto the pendulum as it swings to the right. let it carry you up, and you release for a further burst of speed/distance. Then run over to the wooden bridge and leap forwards and grab the end of it, hold on tight as the bridge collapses and swings you across the gap. Try to release late as you can for maximum distance. You should get the achievement when you land.
