Rocket jumping is an ability the soldier uses to get to the front lines fast, get at a advantageous position or simply to surprise enemy players. Although it can be difficult in the beginning, a experienced rocket jumper can get very high. The demoman also has a sort of rocket jumping. For that see Sticky Jumping.
Basic Rocket JumpingEdit
Jump and fire a rocket simultaneously.
Advanced Rocket JumpingEdit
Same as above, but before you jump crouch. The crouch should only be a fraction of a second long. If you do this right, you can get on (for example) the battlements of 2Fort
Rocket jumping can help you get places you normally should not be getting into such as the secondary respawn on 2Fort by getting in the hole that drops players down into the narrow hallway that leads near the sewer and the courtyard allowing you to kill players as they walk out of the spawn room and injured snipers that run away after injured to come heal at the resupply cabinet.