Bunny hop is executed by approaching in an obstacle with speed, lifting the front of the bike then leveling the pedals.  Some bike with front or full suspension, preload the shocks by pressing down the bike just before you reach the obstacle.

Once the shock have been preloaded, the rider will spring upwards pulling up with the hands and feet at the same time.  As the biker lifts, the hands will roll through twisting the throttle.  After the object is cleared, push down on the bike then absorb the impact with the arms and legs.

It is often times a misconception that a bunny hop without toe clip is achieved by rotating forward on the handlebars.  Lifting a mountain bike while standing next to it is quite difficult to hold on to the handlebars.

Experienced rider can make it look a lot easier than actually is.  New mountain bikers should practice a lot before the attempt to try the bunny hop.  Doing it in a bigger obstacle is quite dangerous too.

With the proper time and practice, this trick can be achieve by the beginners too.