In one sentence, describe what the following article is about: Guacamole turns brown when exposed to air, even air mixed in during stirring. Press the guacamole with the back of a spoon to compress out some of the air. Apart from this minor starting step, you only need to choose one method to prevent browning. Don't just cover the bowl. Press the plastic wrap on top of the guacamole. Press out air bubbles, then seal it around the bowl's edge. For best results, check the type of plastic on the triangular recycling symbol: Of the common options, PVDC provides the best defense against air, followed by LDPE. EVOH cling wrap provides an excellent air seal, but only when dry. Cover the bowl without touching the guacamole. Select a container that barely fits the guacamole, to keep the amount of air low. Place the guacamole in a container with a tight-fitting lid. Pour on just enough water to cover it, then close the lid. This is an effective method for smooth guacamole, which can keep green in the fridge for 2472 hours. Before eating, pour the water out slowly while holding back the guacamole with a spoon. Stir before serving to mix in the last few drops of water. This may be unpleasant in chunky guacamole, made with avocado slices instead of mashed avocado. One test with whole avocados failed within four hours. The more mashed and stirred your guac is, the better this will go. Some chefs swear by this, but there's no evidence that the pit has any special anti-browning chemicals. Most experts agree that this only protects the guacamole directly under the pit, by blocking the air. Any food-safe object could be used for the same purpose but the pit is conveniently at hand.
Summary: Press out air bubbles, then choose a method below. Wrap in plastic wrap. Cover with a layer of water. Leave in the avocado pit.

In one sentence, describe what the following article is about: From the A-stance, lift your dominant elbow up until your forearm is parallel to the floor. Let your wrist turn naturally downwards so that your knuckles are facing the ground. Do this as quickly as possible without moving your entire chest to avoid signaling your punch to your opponent. You can throw a hook with your dominant or nondominant hand. If you're throwing this punch with your other hand, turn your nondominant wrist down while raising the elbow. The hook takes longer to throw than a straight punch, but it's quite powerful when used correctly. Throw hooks when your opponent is really close to you to knock them off balance. A good hook also has a higher chance of knocking your opponent down, since you're striking your opponent at an angle they aren't expecting. The hook requires a small windup for maximum power. To put some weight behind your punch, bend your front leg down and in towards your body like you're curling yourself up. Let your hip follow your knee like you're twisting away from your opponent. Do not move your arms while doing this. Your dominant hand should be directly behind your head at the end of this motion. Reverse the instruction to throw a hook with your nondominant hand; bend your back leg inwards while turning your torso slightly away from you. Maintain a bent elbow as you rotate your entire body towards your target. Pivot your back leg inwards while opening your front leg up to the target. Allow your punching arm to follow your hip and strike your opponent with your middle knuckle. When done correctly, this looks like your entire body is twisting forward like a hinge. For a hook with your nondominant hand the instruction is basically the same except you're twisting from the other direction and using your nondominant leg to pivot your body.
Summary:
Turn your dominant hand down while raising your elbow. Bend your front knee inward while pivoting your entire body. Keep your elbow bent at a 90-degree angle while rotating into the target.