I got this just by bouncing on two cars one after the other. Find two cars close to each other, and bounce on one, then the other, and keep bouncing, alternating between the two cars. While it doesn't count in you bounce on the same on more than once in a row, it also doesn't break your chain, so feel free to bounce on the same on a couple times to reposition your character so you can bounce on the other trampoline.
NOTE: The achievement should unlock for you upon landing on the ground.
I actually fond a good spot for this achievement:
However, you could be attacked, so it helps to have the Spread the Love amp equipped, so you regenerate health at Style 1. That's what the green streak is.