Instructions
Wall Run
Press "L1" and "R1" together to get off the board.
Run toward a wall.
Hold "R1" as you meet the wall head on. As you hit the wall, your character will scale the wall. Releasing "R1" will make your character fall, so make sure you continue to hold it.
Backflip
Skate toward a large jump such as a quarter pipe.
Press the "X" button to ollie at the top of the jump. This will increase your airtime, giving you more time to do a backflip.
Hold the circle button and tap down, then down again on the directional pad. Your character will do a quick backflip.