In this video Jarvis from Skate Warehouse will demonstrate how to do a proper crooked grind. Starting by riding up to your obstacle pay attention not to come in at a parallel angle. Next pop an ollie to hit the obstacle, aim for a spot on the rail slightly ahead of yourself before slamming your nose on it and rotating slightly. After grinding the length of the rail push forward and lift up with your back foot to level the board before the dismount. Keep in mind to bend the knees and use your shoulders to feel the grind.