difficulty = 6

A grind is when you slide on something with only your trucks, grinding them down. (Grind?) To do a grind, roll towards the object you intend to grind (curb, rail, etc.) facing towards it. Then ollie at it, but keep your nose forward and keep moving forward. With some luck, your trucks will land on the rail, and you will go sliding away. To being to learn to grind, try building a small grindrail.