I have been playing online and I have seen some killer tricks. I try to do them I just don't know how. These are the tricks that I mean:
Lay down on skateboard while grinding Flip skateboard so that you grinding on the top. And grind and flip in the air.
I need help. I've finished the whole game but need these. So if you know any tricks that are cool while grinding. Tell me! I know that you press triangle, and circle to do some awesome tricks but don't know those ones