Using a plunger to remove a dent works best on large, shallow dents in flat components of the body like the door or hood.  Whether you use a toilet plunger or an automotive one designed for dent pulling, no plunger can remove creases from steel, they can only pop dents back out.  If the dent is smaller than a quarter, a plunger likely will not resolve it. The flatter the body panel, the better the plunger method will work. You can actually use a toilet plunger with a similar level of effectiveness for this method as you can a dent removing plunger purchased from an auto parts store.  Plungers designed for dent removal may have a higher success rate with more difficult dents.  Use a clean plunger to avoid getting any kind of debris on the paint of your vehicle. Automotive plungers are often quite a bit more expensive than toilet plungers. Use a bit of water and a rag to moisten the suction surface of the plunger.  This will allow it to create a seal against the vehicle, which will enable you to pull up on the plunger to suck the metal back into shape. Make sure to use clean, plain water to avoid damaging the paint. If the dent is larger than the circumference of the plunger, start on the edges of the dent.  If it is smaller than the plunger, place the plunger directly over the dent.  Press the plunger into the vehicle.  You may need to repeat the process from multiple angles on larger dents. When placing the plunger along the side of the dent, ensure the plunger is over both the dented and undented area. Pull backward on the plunger in short, jerking motions just as you might when plunging a toilet.  The plunger may pop off before the dent is removed, so prepare yourself to re-moisten the plunger and start again.  It may take multiple tries to suck a dent back out of the metal. Short, quick motions will yield the best results when sucking dents out of steel.
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One-sentence summary -- Assess the size and location of the dent. Purchase a clean plunger. Moisten the rubber edge on the plunger. Position the plunger over the dent and press into the vehicle. Pull out on the plunger repeatedly.

Q: Vomiting should subside after about a day or less. If you’ve tried different treatments and the vomiting continues for more than 12 hours, contact your doctor. It could be a sign of a deeper problem. For children under 2 years old, see a doctor if they don’t stop vomiting after 12 hours. Continued vomiting can deplete your body of its fluids which can lead to dehydration. Furthermore, nausea and vomiting can prevent you from drinking an adequate amount of water, which can also cause dehydration. If untreated, dehydration can be very dangerous. Get medical attention immediately if you start to show signs of dehydration.  Symptoms of dehydration include dry mouth, sleepiness, decreased or dark urine, headache, dry skin, and dizziness. If you’re unable to hold down any water, pay close attention to any symptoms of dehydration. If you’re experiencing intense and sharp pain in your abdomen or your chest while you’re vomiting, it could be a sign of a serious medical issue. Get to an emergency room as soon as possible to make sure it isn’t something more serious. Sharp pain your chest could be a sign of an impending heart attack. Continued vomiting can potentially rupture or tear your stomach lining, which can cause blood to appear in your vomit. There are also other serious medical conditions that can result in blood appearing in your vomit. If you see dark, red blood or what looks like coffee grounds in your vomit, get emergency medical attention as soon as possible. A hemorrhage or rupture needs to be treated as soon as possible. Don’t delay seeking medical help if you see blood in your vomit. Nausea and vomiting is a symptom of a concussion. If you suffered a blow to the head and you start to experience nausea and vomiting, call your doctor to see what you should do.  Do not go to sleep even if you feel tired. Other signs of a concussion include headache, confusion, dizziness, slurred speech, and ringing in the ears.
A: See your doctor if you don’t stop vomiting after 12 hours. Get medical attention if you exhibit signs of dehydration. Seek emergency medical care for severe abdominal or chest pain. Go to the emergency room if you have blood in your vomit. Call your doctor if you’re vomiting after a head injury.

Article: Extending from any knot are two “arms.”  Grab one of these arms and start turning it.  You can turn it clockwise or counterclockwise.  The number of times you’ll need to turn it depends on the tightness of the knot.  The arms of very tight knots will need to be turned more than knots that are merely tight. Once you’ve turned one arm of the knot several times, push it through the heart of the knot using your hands.  Start as close as you can to the knot itself, since the further from the knot you begin, the less leverage you will have. If you find that you cannot push the turned end through, twist it in the same direction several more times, then try to push it through. Once you’ve pushed a bit of the knotted material through the tight loop, pull it apart from the other side.  If the knot is still tight, wiggle the bit you pushed through from side to side.  This should enable you to bring it through the rest of the way.  As you pull, the whole knot should loosen up even more.
Question: What is a summary of what this article is about?
Twist one end of the knot. Push the turned end through the knot. Pull the knot apart.