. Do an ollie as high as you can, then as you level off your feet, give a nudge with the front foot on the board so it spins 180 degrees. You may want to use a little "scoop" motion with the back foot to make it spin easier. . Do the same thing as a pop shove it, except when you nudge the board, kick the little area where the side of the board rises. Try out a few different motions until you get it to spin. This is not an easy trick, so practice and don't give up. . Start with a fairly low rail (equal to or less than one foot.) This is not easy, so take it in steps.  Start out simply rolling up to the rail, then jump off of your board and land with just your feet on the rail, letting the board roll away. Next, practice popping the board up as you jump, but don't worry about where it goes after that. Just make sure that your feet land on the rail. Make sure you roll up to the rail at a slight angle, not completely straight. This way, there's less risk of one truck getting caught on the start of the rail. Now it's time for the real thing. Ollie as high as you can, in the direction of the rail. Land with your feet on the bolts and the board balanced on the rail. If the deck is sliding sideways on the rail, it's a board-slide. If you stay in the direction of the rail so your trucks lock in and grind it, it's a 50-50 grind. Once you get to the end of the rail, turn the board around if you're in a board-slide (so it faces the right direction) and land over the bolts. If you're doing a 50-50 grind, lift the front wheels slightly (by pushing on the tail, again slightly) to the front of the board doesn't plummet down. An alternative is to ollie off. ead to the skatepark and learn to drop in. Dropping in takes guts, but it's worth it.  Start with your tail on the coping (the metal on the top of the half-pipe) and your foot just behind the bolts, but far enough back to balance. Put your front foot over the bolts, and slam the board down. Don't hesitate, or you will fall. It takes confidence and power. Be sure to lean...

How would you rephrase that briefly using Vietnamese?
Thử kiểu xoay ván trên không. Thử kiểu đá lật. Thử trượt trên lan can. Đi đến sân tập và học cách trượt trong máng trượt. Tập một số kỹ thuật trên máng trượt.