As the nose pops up, hit it with your back knee. This will probably hurt the first few times you do it. Don't worry, the better you get, the more control you'll have over this part. It you do a No Comply smoothly, you don't need to slam the board into your knee - it will look more like the board just pops up against your entire lower leg. This is a good way to do it, because your pants will latch onto the grip tape, and you can bring the board up along with you, in a nice controlled way.
Remember, as all of this happens, you should be jumping.
When your knee hits the board, it will bounce it back down.
Place your front foot back on the nose of the board, and slam your foot down. Lean forwards, towards the nose of your board. You want to land clean, and ride away.