Eco Rockets
Eco Rockets
When Jak picks up eco, he does a fist in the air jump animation. By interrupting this animation on the correct frame window with a spin kick or a punch, Jak can be thrown upwards while in a grounded state similar to Rocket Uppercut. Being in the grounded state is what allows for the zoom while in the air.
Eco vents give a much higher rocket than the eco blops.