Rocket Jump is an ability of Foot Soldier. It allows the Foot Soldier to jump to a higher place. It can be used to get to higher ground and have an advantage on enemies, as well as fleeing from burrowing Chompers. It takes 20 seconds to recharge. Its alternate ability is Rocket Leap and its plant counterpart is the Super Pea Jump.
Soldier Zombies take to the rooftops! The Rocket Jump ability enables the Soldier Zombies to get to places other characters can't. That's one off his bucket list for sure!
Do the same strategies as you would with Peashooter with Super Pea Jump, and use the Rocket Jump to get to an elevated position. It is very useful to take down plants from a distance. Remember to be stealthy while using it. On some maps, Rocket Jump can be really useful for getting to hard to reach places like the tops of houses. In last case scenarios, a good idea is to use this to get out of a jam and to heal up. If a Chomper is burrowing underground nearby, this may be a good idea to use to jank the Chomper out.
It is based on the technique of the same name found in many first and third person-shooters, most notably by the Soldier in Team Fortress 2.