BS 5-0
2400 riders can do it
A basic rear truck slide backwards.
How do it
A basic backwards rear truck slide.
Feet are in ollie stance. Drive up parallel, with your back facing the obstacle. Jump and shift your weight onto the rear truck, as if performing a manual.
You can catch the ledge with your rear truck, but just doing a clean, balanced slide is a better option.
Exit with a regular ollie snap, this will allow you to make the exit earlier. Or you can simply ride off the end of the obstacle.