The pop shuv -it is  not a hard trick to do standing still but pulling it off when rolling at speed  is quite difficult. To do a pop shuv-it roll along (or  stand still) and begin as if you were to ollie. Drag your front foot up the  board but drag it slightly over towards your body. Whilst doing this the back foot should be pushing the tail end of the board in an opposite direction to the front foot. The board should travel 180 degrees in the air ON THE WAY UP. It should be caught at the peak of height with both feet and stomped to the ground. A good pop-shuvit is caught and the  very peak of it's flight and any good skater will do exactly that.