Spinning beyond 90°
Keep the rear wheel up for as long as you can.If you are confident about pivoting on the front wheel, you can push the endo side drop to 90° or more on the front wheel. Then, relying on your inertia and ejecting yourself away from the wall with a firm push-up, you'll be able to hop the front wheel off and complete the turn in mid-air to land at 180 or even 360 degrees from your initial position on the obstacle. This technique could be used to re-position yourself as you drop for interesting line combinations, dropping at 90° or 180° from your initial direction. But for the "Whow!" factor at demos, you can perform a 180° pivot on the front wheel, from facing a gap, to complete the full 360° as you drop off a high platform.
Swing the frame sideways
The full 180° turn before a firm push up.Swing your hips to initiate the endo and keep pivoting on the front wheel with your rear wheel well lifted. Maintain your shoulders over the bars. But when you have pivoted about 180 degrees and are ready to hop, perform a firm push up on the handlebars and shift your weight over the rear wheel.
360° nose drop
1° Riding at a walking pace, apply the front brake and turn to your back foot side, swinging your hips to your front foot side.
2° Keep pivoting on the front wheel with your rear wheel well lifted, shoulders over the handlebars, arms slightly flexed.
3° Once you have pivoted about 120°, perform a firm push-up on the handlebars and shift your weight over the rear wheel.
4° The push-up together with a good swing of the handlebars away from the obstacle will help you spin the bike further.
5° In the air, pull the bike further to follow the rotation of your shoulders and re-align it beneath you as you drop, rear wheel first.
6° Keep your rear brake locked as the rear wheel touches down and crouch progressively to absorb the impact, then roll away.
Lowering your rear wheel below the obstacle's height before the final push-up would make it harder to clear the front wheel (the front tyre gets hooked to the edge, a sure way to crash on your back).
180° landing fakie
If you decide to only pivot 180 degrees and then drop backwards, away from the obstacle, then you don't have to push as much on the handlebars. Instead, focus on keeping the bike straight during the tyre push-up away from the edge, to clear your front wheel without lowering as much the rear wheel before touch-down. Of course to stop the rotation at 180°, you'll want to put less emphasis on spin and perform the push up sooner.
The push-up clears the front wheel off the obstacle. Don't let the rear wheel drop as much as you would for a full 360° drop. You want to be able to hold the bike going fakie, and landing with the bike standing too vertical would make it difficult.
180° drop landing backwards
1° Swing your hips to initiate the endo and keep pivoting on the front wheel until you reach about 120° in rotation.
2° At about 120°, perform a firm push-up on the handlebars but stay centred over the bike to keep it straight.
3° The push-up clears the front wheel off the obstacle, but don't let the rear wheel drop as much as you would for a full 360° drop.
4° Release the brakes as you land, so the bike can roll back as the rear wheel touches down, regroup over the centre of the bike.
5° Crouch on the bike to absorb the impact while backpedalling as progressively as you can to keep your backward momentum.
6° As you ride back, give a sharp swing in the handlebars to complete the turn, or terminate with a half cab to keep your flow.
Landing to fakie wheelie
A neat combination with the 180° nose drop is to carry on with a fakie wheelie without letting the front wheel drop to the ground. This will requires a precise backpedalling action right in tune with your backward momentum so as not to stop the move accidentally. Practice makes perfect.
You can also check out Jimmy Ertzer's tutorial video to get a different view
(French subtitled in English).