Understanding the move
Bridging a gap with your bike, make sure to position your rear hub above or beyond the rear edge of the gap, so that your wheel doesn't get stuck. With a quick push-up from the arms, thrust your hips away from the front edge and spin the bars on your lazy foot side.
Carry on the movement by lifting the front wheel during an upward extension. Follow the rotation with your shoulders as if you wanted to look back. Finish the extension with a small pedal kick that propels the rear wheel off the edge, and keep your rotational inertia going.
Once in mid-air, swing the bike further to face the opposite direction, past the alignment with your shoulders, twist your hips to add more rotational effect.
By flexing your arms and knees, adjust the exact position of the bike so it lands with each wheel positioned exactely in place of the other.
In this specific scenario, the pedal kick should just compensate for the backwards motion you would get when pivoting on the rear wheel, but it should not send you completely across the gap either.
Depending on the final position you aim for, you can increase or decrease the amount of kicking power. Over-do it and you will end up jumping over the bridging-gap with a 180° turn to back-wheel.
If you don't kick enough, you'll end up a little bit offset backwards from your initial position like when pivoting on the rear wheel, hence missing the edge where your front wheel was resting.
What would be the right amount of kicking power is difficult to assess as this will vary depending on the surface and adherence of the edges you are bridging. The pedal kick must take place at the last moment. On slippery obstacles, use more body language and less pressure in the pedal kick.