Pop behind the Wake

Hey guys,
I tried a tantrum behind boat today and I was very close to landing. If I had just a little more pop I would be able to ride away. Since I don't ride behind boat a lot I have some question about getting the proper air to perform tricks. Should i have my legs extended completely straight by the time I hit the top of the wake? The pop not only applies to the tantrum but simple things like grabs. Some things I have learned is to push my legs down from the bottom of the wake all the way to the top and to edge all the way to the top of the wake. What is the correct way to get the insane air off the wake that you need to go huge on tricks.