Catch the board with your feet once it has spun around once (or twice or three times, if that's what you are going for). Just like with a Backside Shuvit, you need to make sure you catch the board, or it will spin too much.
For a good, clean Backside Pop Shuvit you want to catch the board when it is right at the top of its pop. So, right when the board is as high as it will pop into the air, and just before it starts to fall back to the ground again. It'll take some practice to figure out when this is.
Land, bend your knees, and roll away.
