Article: Load-bearing dry stack walls should be started at the corners. Begin constructing corners by laying 1 stone in the corner of the trench. Then lay 3 stones extending out in each direction. This forms the corner joint. If the wall is more than 1 stone thick, lay more stones parallel to the first ones. Act as if each section represents one stone. Construction bricks are designed to interlock at corners. The 4 stones you laid from each direction forms the first layer of cornerstones. For the second layer, overlap the first stone by laying another on top of it. Continue interlocking the stones as you build upward, alternating which side lays over the other. The interlocking stone structure should look like a zipper going up. Stack 3 to 5 layers of stones at the corner before filling in the rest of the wall. Then if you need to go higher, stack more layers at the corners. After constructing the corners, extend outward from here and fill in the rest of the trench. Interlocking bricks have shapes cut into them that line up with the other bricks. Fit the bricks together as you lay them in place. Place the bricks in the trench all along the perimeter to form the first layer. Make sure each rock you place is secure. Push it down to lock it in place snugly. Pound them down gently with a rubber mallet if you have to. Always stack a complete layer around the whole perimeter before starting another layer. When starting a new layer, each rock should overlap the joint between the rocks below it. This helps make your wall more stable. Continue this pattern as you stack more layers. If your bricks are smaller and you need to use more than one to cover the width of the trench, make sure the stones nearby touch each other. Otherwise, the wall won't be able to support much weight. Part of the reason you need a stem wall is to keep ground moisture away from the structure you're building. Stacking the wall at least 1.5 feet (0.46m) above ground level helps keep your structure dry and avoids water damage. Do not build the stem wall higher than 8 feet (2.4m). A wall higher than this requires extra reinforcement. Many localities even ban stem walls higher than 4 feet (1.2m) for safety reasons.
Question: What is a summary of what this article is about?
Lay a cornerstone in each corner. Construct the corners by interlocking stones. Lay the stones down for the first layer of your wall. Stagger the rocks as you start new layers. Stack your wall at least 1.5 feet (0.46m) above the ground level.
Article: While you can perform a 180 on your skateboard from a stand still position, it will be easier if you already have some momentum going. A few pushes should work (if you are doing a gap then do more pushes, but you should only try this if you have done a 180 plenty of times before). If this is your first time attempting this trick or you're still new to it, then you should go at a slower pace so you have more of a handle on your board. Once you've got a few pushes in and have some momentum built up, it's time to place your feet in the modified ollie position for your 180. Plant your back foot on the tail of your board while you rotate and slide your front foot to the edge of the board. Remember that your back foot should be on the back edge of the tail. If you're doing a backside 180, have your front shoulder slightly lowered and in front of you and bend your knees. For a frontside, do the same with your back shoulder. This part may feel natural, but if you wind too far, then you'll over spin. If you don't wind enough, then you won't spin enough. This might take some practice so just remember to keep patient. When you do try to execute the trick if you spin too much you'll over rotate and you may lose your board from under you. If you don't spin enough your board won't turn enough and may land sideways causing a stop to forward momentum. You may also want to start to turn the board in the direction you want it to go with your back foot. For a backside 180 you'll be turning towards your back instead of your front, and vice versa for a frontside. It will be complicated in the beginning, and takes a few tries to fully get it. For a backside 180, if you ride "goofy" you'll want to start to turn the board to your right, and if you're "regular" turn the board to your left. For a frontside 180, "goofy riders will start to turn the board left, and "regular" riders will turn the board right. Push the tail of your board down until it hits the ground. When you feel it hit, that's when you'll begin to slide your front foot upwards. Use force, but not too much, as too much pressure won't allow you to get the lift you need. For "regular" skaters you'll swipe your left foot up and left for a backside 180, and right for a frontside 180. For "goofy" skaters you'll swipe your right foot up and right for a backside 180, and left for a frontside 180. Remember here that you're turning starting at the top of your body with your shoulders and then letting your legs follow you. As you spin your shoulders and then your waist and legs, lift your body upwards with your board. Don't lock your knees. If you extend your legs and lock your knees you will push the board down and away from you, preventing it from spinning along with you.
Question: What is a summary of what this article is about?
Get some speed. Put your feet in an ollie position. Wind up the opposite way you want to spin. Start by doing an ollie. Snap downward with your back foot. Swipe your front foot up and to the opposite side of your board that it was originally planted on when you are doing the ollie. Shift your weight in the direction you want to spin.