This achievement, as it says, is for successfully jumping over 10 obstacles (traps, trees etc.). Sounds pretty simple and it is, there are plenty of opportunities through the story to get this. When the voice over says "Jump" you jump plain and simple.
Make sure the circle in the bottom middle of the screen shows a picture of you, and not an eye. I played the whole game with the eye and never realized the Kinect was assuming I was crouching. If you have the eye and jump you will always fail. Make sure the circle shows a picture of your body and then it will properly recognize you jumping over a obstacle.