Abubaca
To do a abubaca you...
1. Go at the ramp at a speed that will get you to the top of the ledge. (Nothing to fast)
2. Once you are on-top of the ledge stall your back tire and pull up to a balanced height (like a manual).
3. Hop and drop backwards, and start to fakie out. Something
that I do that help's the hop backward is when you are balancing drop you butt so it's
close to the tire that way the hop is much easier.
When you are first trying to land the Abubaca expect to have some bad back and butt injury's as this isn't the most forgiving trick. Once you land this trick you will probably want to learn the fufanu which you add in a spin.