Exit Plant is similar to Firm Plant (Fp). Only real difference is the ending, but here is Exit Plant step for step.
1. Face a wall. 2. Get on board and ride to wall. 3. Ollie into wall, get off board when you hit the wall. 4. Run out from wall (this step can be skipped for this technique) 5. Caveman into AirShuffle (this is what's different then Fp).