Pull up on your handlebars and push forward keeping your feet parallel to the ground once your font clears point your toes down a little bit and lift up on your pedals that will lift your back end up you need to shift your weight forward when you lift your back up. You might be able to get away with just lifting your front end up depending on the obstacle and your bike and your back will just roll over it. I def jump curves and other stuff on my road bike/ cyclocross just don't always do it.