你得先会b/s noseslide ，会b/s 50-50就更好，但不是一定要会。上到目标物时成45度角，在板头离滑道不到一只脚的地方起跳，跳得高一点，在你把脚移到板头时重心也移到前脚，后脚应在板后部离板的中心较远的地方，搭上后让大部分重心在板头，确保板头在与滑道成约30-45度角板头和桥一起接触滑道的位置稳定滑行，也要保持部分力量在后脚不至于人往前倒。可能要花一些时间才练成，不过有些人很快就学会的。一旦你可以滑行了，你可以转体180度下或倒板下像noseslide一样。

　　[bs crooked grind]

　　For this trick you should be able to b/s nose slide and it would be good to know how to b/s 50-50 but not completely needed.

　　Come at your target at an angle around 45 degrees. When you are about a foot away pop down and ollie. Get high and transfer your weight to your front foot as you are moving your front foot on the nose of your board. Your back should be a little further back then the middle of the board. Once you land keep enough weight on the front of your board to still be in crooked grind postion but have enough back to be able to grind without falling forward. It will take a while before you can grind, although for some it might be right away. Once you can grind the easiest thing to do is just to twist 180 and come off switch. Shove its are also very easy to do and both techniques to getting off are almost the same as a b/s nose slide so I won't go over them.

　　心得：与杠子平行或小角度滑行，重心在前脚，Ollie之后用腰使板头转动30-45度并迅速把重心移到前桥与板头之间，下来时重心移回到板中间。