NoirResurection

Best answer as chosen by Asker / Ratings
If your talking about a double jump then there is no such thing in this game. If your talking about how they do jumps with gernades / rockets then it's a mater of timing. When you are trying to reach a higher spot in one of the maps you just have to throw the gernade to the floor and jump at the right time so that the blast of the gernade will give you a little extra boost in your jump. It takes some time to master but once you get the hang of it then you will be able to do it with the rocket also.